I came across some examples of Medieval windows made with the "cives" 
technique ("fenêtre à cives") and thought that it would be interesting 
to experiment a bit with the concept. This is just a test scene, using 
photons of course. Very promising

A bit of documentation:
http://enverreetcontrefil.net/technique-du-vitrail-redige-pour-art-et-histoire/

-- 
Thomas

Post a reply to this message

Attachments:
Download 'cive medieval_test.png' (315 KB)

Preview of image 'cive medieval_test.png'

in news:5c80dc5f@news.povray.org Thomas de Groot wrote:

> I came across some examples of Medieval windows made with the "cives"
> technique ("fenêtre à cives")
> 

OMG, "Buzenscheiben", I've had to recreate and colourise those many times 
for printing on self adhesive window films. 

ingo

Post a reply to this message

On 7-3-2019 16:02, ingo wrote:
> in news:5c80dc5f@news.povray.org Thomas de Groot wrote:
> 
>> I came across some examples of Medieval windows made with the "cives"
>> technique ("fenêtre à cives")
>>
> 
> OMG, "Buzenscheiben", I've had to recreate and colourise those many times
> for printing on self adhesive window films.
> 

LOL Indeed, that is where those are mostly found nowadays.

To all: What are those windows called in other languages?

-- 
Thomas

Post a reply to this message

in news:5c821989@news.povray.org Thomas de Groot wrote:

> On 7-3-2019 16:02, ingo wrote:
>> in news:5c80dc5f@news.povray.org Thomas de Groot wrote:
>> 
>>> I came across some examples of Medieval windows made with the
>>> "cives" technique ("fenêtre à cives")
>>>
>> 
>> OMG, "Buzenscheiben", I've had to recreate and colourise those many
>> times for printing on self adhesive window films.
>> 
> 
> LOL Indeed, that is where those are mostly found nowadays.
> 
> To all: What are those windows called in other languages?
> 

In dutch, rondglas, maanglas or schijvenglas for the butzen and 
cylinderglas or kroonglas for the method where they first make a cilinder 
and then cut it open.

https://www.youtube.com/watch?v=TuDl27MZDnY
https://www.youtube.com/watch?v=ddA1PiGd8wc
https://www.youtube.com/watch?v=CelmpVdo7Kc

Ingo

Post a reply to this message

Am 08.03.2019 um 08:28 schrieb Thomas de Groot:
> On 7-3-2019 16:02, ingo wrote:
>> in news:5c80dc5f@news.povray.org Thomas de Groot wrote:
>>
>>> I came across some examples of Medieval windows made with the "cives"
>>> technique ("fenêtre à cives")
>>>
>>
>> OMG, "Buzenscheiben", I've had to recreate and colourise those many times
>> for printing on self adhesive window films.
>>
> 
> LOL Indeed, that is where those are mostly found nowadays.
> 
> To all: What are those windows called in other languages?
> 
In German, it is Butzenglas, Batzenscheibe, Nabelscheibe or Ochsenauge. 
I modelled it some years ago with wings 3d, but never posted the code 
(mesh) and the macros to produce windows from it. If someone is 
interested, I will clean up the code a little bit and post it.

Beste regard
Michael

Post a reply to this message

Thomas de Groot <tho### [at] degrootorg> wrote:
.....
> To all: What are those windows called in other languages?

According to Wikipedia its English name is crown glass:
https://en.wikipedia.org/wiki/Crown_glass_(window)

I find Wikipedia useful for finding names for things in other languages.

If one reads the article above in the available languages;
German, English, French, Dutch, Polish, Czech, Pashto
(See the Languages links at the bottom of the left menu.)

- one can find names for crown glass in these languages.

--
Tor Olav
http://subcube.com
https://github.com/t-o-k/

Post a reply to this message

On 11-3-2019 0:42, Tor Olav Kristensen wrote:
> Thomas de Groot <tho### [at] degrootorg> wrote:
> .....
>> To all: What are those windows called in other languages?
> 
> According to Wikipedia its English name is crown glass:
> https://en.wikipedia.org/wiki/Crown_glass_(window)
> 
> I find Wikipedia useful for finding names for things in other languages.
> 
> If one reads the article above in the available languages;
> German, English, French, Dutch, Polish, Czech, Pashto
> (See the Languages links at the bottom of the left menu.)
> 
> - one can find names for crown glass in these languages.
> 

Obvious! I regularly use this but somehow failed to apply it to the 
present topic! ;-/

-- 
Thomas

Post a reply to this message

On 10-3-2019 20:57, MichaelJF wrote:
> Am 08.03.2019 um 08:28 schrieb Thomas de Groot:
>> On 7-3-2019 16:02, ingo wrote:
>>> in news:5c80dc5f@news.povray.org Thomas de Groot wrote:
>>>
>>>> I came across some examples of Medieval windows made with the "cives"
>>>> technique ("fenêtre à cives")
>>>>
>>>
>>> OMG, "Buzenscheiben", I've had to recreate and colourise those many 
>>> times
>>> for printing on self adhesive window films.
>>>
>>
>> LOL Indeed, that is where those are mostly found nowadays.
>>
>> To all: What are those windows called in other languages?
>>
> In German, it is Butzenglas, Batzenscheibe, Nabelscheibe or Ochsenauge. 
> I modelled it some years ago with wings 3d, but never posted the code 
> (mesh) and the macros to produce windows from it. If someone is 
> interested, I will clean up the code a little bit and post it.
> 

Interesting! I modelled the glass in Silo and am currently writing 
macros for the different types of windows. I certainly shall continue 
till completion, but I would be curious to compare eventually. So, yes, 
please?

-- 
Thomas

Post a reply to this message

Thomas de Groot wrote on 07/03/2019 09:54:
> I came across some examples of Medieval windows made with the "cives" 
> technique ("fenêtre à cives") and thought that it would be interesting 
> to experiment a bit with the concept. This is just a test scene, using 
> photons of course. Very promising
> 
> A bit of documentation:
> http://enverreetcontrefil.net/technique-du-vitrail-redige-pour-art-et-histoire/ 
> 
> 
A nice work, Thomas.
Sometimes you find also the circles arranged to fit the available space 
(like these pictures taken near Bolzano in Italy).

Paolo

Post a reply to this message

Attachments:
Download 'img_20160824_02.jpg' (303 KB) Download 'img_20160824_03.jpg' (125 KB) Download 'img_20160824_01.jpg' (314 KB)

Preview of image 'img_20160824_02.jpg'

Preview of image 'img_20160824_03.jpg'

Preview of image 'img_20160824_01.jpg'

On 11-3-2019 12:34, Paolo Gibellini wrote:
> Thomas de Groot wrote on 07/03/2019 09:54:
>> I came across some examples of Medieval windows made with the "cives" 
>> technique ("fenêtre à cives") and thought that it would be interesting 
>> to experiment a bit with the concept. This is just a test scene, using 
>> photons of course. Very promising
>>
>> A bit of documentation:
>> http://enverreetcontrefil.net/technique-du-vitrail-redige-pour-art-et-histoire/ 
>>
>>
> A nice work, Thomas.
> Sometimes you find also the circles arranged to fit the available space 
> (like these pictures taken near Bolzano in Italy).
> 

Yes indeed. I am currently working on these now, also on the variations 
of tints within one window.

It started as a small testing project, just for the fun of it, and 
before I knew, it grew into a full-fledged project. :-)

-- 
Thomas

Post a reply to this message

Am 11.03.2019 um 08:30 schrieb Thomas de Groot:
> On 10-3-2019 20:57, MichaelJF wrote:
>> Am 08.03.2019 um 08:28 schrieb Thomas de Groot:
>>> On 7-3-2019 16:02, ingo wrote:
>>>> in news:5c80dc5f@news.povray.org Thomas de Groot wrote:
>>>>
>>>>> I came across some examples of Medieval windows made with the "cives"
>>>>> technique ("fenêtre à cives")
>>>>>
>>>>
>>>> OMG, "Buzenscheiben", I've had to recreate and colourise those many 
>>>> times
>>>> for printing on self adhesive window films.
>>>>
>>>
>>> LOL Indeed, that is where those are mostly found nowadays.
>>>
>>> To all: What are those windows called in other languages?
>>>
>> In German, it is Butzenglas, Batzenscheibe, Nabelscheibe or 
>> Ochsenauge. I modelled it some years ago with wings 3d, but never 
>> posted the code (mesh) and the macros to produce windows from it. If 
>> someone is interested, I will clean up the code a little bit and post it.
>>
> 
> Interesting! I modelled the glass in Silo and am currently writing 
> macros for the different types of windows. I certainly shall continue 
> till completion, but I would be curious to compare eventually. So, yes, 
> please?
> 
Hello Thomas,

I was on an occupational journey and had to congratulate my father to 
his eighty-first birthday today, living at the same location at Essen, 
Germany. I hope I can post the code tomorrow. It is just a mesh and some 
macros to put the tiles into a window with rounded frames and a frame 
all around them to have a window.

Best regards
Michael

Post a reply to this message

On 11-3-2019 22:32, MichaelJF wrote:
> Am 11.03.2019 um 08:30 schrieb Thomas de Groot:
>> On 10-3-2019 20:57, MichaelJF wrote:
>>> Am 08.03.2019 um 08:28 schrieb Thomas de Groot:
>>>> On 7-3-2019 16:02, ingo wrote:
>>>>> in news:5c80dc5f@news.povray.org Thomas de Groot wrote:
>>>>>
>>>>>> I came across some examples of Medieval windows made with the "cives"
>>>>>> technique ("fenêtre à cives")
>>>>>>
>>>>>
>>>>> OMG, "Buzenscheiben", I've had to recreate and colourise those many 
>>>>> times
>>>>> for printing on self adhesive window films.
>>>>>
>>>>
>>>> LOL Indeed, that is where those are mostly found nowadays.
>>>>
>>>> To all: What are those windows called in other languages?
>>>>
>>> In German, it is Butzenglas, Batzenscheibe, Nabelscheibe or 
>>> Ochsenauge. I modelled it some years ago with wings 3d, but never 
>>> posted the code (mesh) and the macros to produce windows from it. If 
>>> someone is interested, I will clean up the code a little bit and post 
>>> it.
>>>
>>
>> Interesting! I modelled the glass in Silo and am currently writing 
>> macros for the different types of windows. I certainly shall continue 
>> till completion, but I would be curious to compare eventually. So, 
>> yes, please?
>>
> Hello Thomas,
> 
> I was on an occupational journey and had to congratulate my father to 
> his eighty-first birthday today, living at the same location at Essen, 
> Germany. I hope I can post the code tomorrow. It is just a mesh and some 
> macros to put the tiles into a window with rounded frames and a frame 
> all around them to have a window.
> 

That is ok, Michael. Happy Birthday to your father! I hope he is in good 
health.

-- 
Thomas

Post a reply to this message

Am 12.03.2019 um 11:03 schrieb Thomas de Groot:
> On 11-3-2019 22:32, MichaelJF wrote:
>> Am 11.03.2019 um 08:30 schrieb Thomas de Groot:
>>> On 10-3-2019 20:57, MichaelJF wrote:
>>>> Am 08.03.2019 um 08:28 schrieb Thomas de Groot:
>>>>> On 7-3-2019 16:02, ingo wrote:
>>>>>> in news:5c80dc5f@news.povray.org Thomas de Groot wrote:
>>>>>>
>>>>>>> I came across some examples of Medieval windows made with the 
>>>>>>> "cives"
>>>>>>> technique ("fenêtre à cives")
>>>>>>>
>>>>>>
>>>>>> OMG, "Buzenscheiben", I've had to recreate and colourise those 
>>>>>> many times
>>>>>> for printing on self adhesive window films.
>>>>>>
>>>>>
>>>>> LOL Indeed, that is where those are mostly found nowadays.
>>>>>
>>>>> To all: What are those windows called in other languages?
>>>>>
>>>> In German, it is Butzenglas, Batzenscheibe, Nabelscheibe or 
>>>> Ochsenauge. I modelled it some years ago with wings 3d, but never 
>>>> posted the code (mesh) and the macros to produce windows from it. If 
>>>> someone is interested, I will clean up the code a little bit and 
>>>> post it.
>>>>
>>>
>>> Interesting! I modelled the glass in Silo and am currently writing 
>>> macros for the different types of windows. I certainly shall continue 
>>> till completion, but I would be curious to compare eventually. So, 
>>> yes, please?
>>>
>> Hello Thomas,
>>
>> I was on an occupational journey and had to congratulate my father to 
>> his eighty-first birthday today, living at the same location at Essen, 
>> Germany. I hope I can post the code tomorrow. It is just a mesh and 
>> some macros to put the tiles into a window with rounded frames and a 
>> frame all around them to have a window.
>>
> 
> That is ok, Michael. Happy Birthday to your father! I hope he is in good 
> health.
> 
Hello Thomas,
you will find the macros now in p.b.s-f. I haven't used them in 
closeups, so the textures could need improvement.

As to my father: He was very happy about my unheralded visit and I would 
be happy to have his health condition if I ever reach his age.

Best regards
Michael

Post a reply to this message

This is #2.

Basic frame texture and some small issues (code needs cleaning up).

-- 
Thomas

Post a reply to this message

This is #2.

Basic frame texture and some small issues (code needs cleaning up).
-- 
Thomas

Post a reply to this message

Attachments:
Download 'cive medieval_test_#2.png' (344 KB)

Preview of image 'cive medieval_test_#2.png'

Am 13.03.2019 um 12:49 schrieb Thomas de Groot:
> This is #2.
> 
> Basic frame texture and some small issues (code needs cleaning up).
Hello Thomas,

congratulations, you crafted this very well. It's very to close to my 
macros and showing, that I overlooked a small issue. But with sane 
definitions of the width of the wooden frame no one will notice my fault;)

Best regards
Michael

Post a reply to this message

On 13-3-2019 19:47, MichaelJF wrote:
> Am 13.03.2019 um 12:49 schrieb Thomas de Groot:
>> This is #2.
>>
>> Basic frame texture and some small issues (code needs cleaning up).
> Hello Thomas,
> 
> congratulations, you crafted this very well. It's very to close to my 
> macros and showing, that I overlooked a small issue. But with sane 
> definitions of the width of the wooden frame no one will notice my fault;)
> 

Thank you indeed, Michael. I have not yet looked at your code but will 
do that soon. However, your test image is very explicit and shows the 
good work already.

The small issue I was talking about is the thin line of light visible 
between the glass/lead and the window frame. It could be the window 
being a tiny bit too small but I guess it is light "leaking" at angles. 
Something similar is shown at the angle between floor and wall. I dimly 
remember this phenomenon was discussed many years ago and I do not 
remember the way to correct that, except, I believe, by using stochastic 
anti-aliasing. I shall test that in any case.

-- 
Thomas

Post a reply to this message

On 14-3-2019 8:43, Thomas de Groot wrote:
> The small issue I was talking about is the thin line of light visible 
> between the glass/lead and the window frame. It could be the window 
> being a tiny bit too small but I guess it is light "leaking" at angles. 
> Something similar is shown at the angle between floor and wall. I dimly 
> remember this phenomenon was discussed many years ago and I do not 
> remember the way to correct that, except, I believe, by using stochastic 
> anti-aliasing. I shall test that in any case.
> 

As I supposed indeed, stochastic antialiasing (with no_cache) solves the 
issue.

-- 
Thomas

Post a reply to this message

On 14-3-2019 13:28, Thomas de Groot wrote:
> On 14-3-2019 8:43, Thomas de Groot wrote:
>> The small issue I was talking about is the thin line of light visible 
>> between the glass/lead and the window frame. It could be the window 
>> being a tiny bit too small but I guess it is light "leaking" at 
>> angles. Something similar is shown at the angle between floor and 
>> wall. I dimly remember this phenomenon was discussed many years ago 
>> and I do not remember the way to correct that, except, I believe, by 
>> using stochastic anti-aliasing. I shall test that in any case.
>>
> 
> As I supposed indeed, stochastic antialiasing (with no_cache) solves the 
> issue.
> 

The downside of this is that combining stochastic aa with photons, will 
dramatically decrease render speed. A rough calculation for the image 
above, with a crude setting of aa (+a0.1) and with photons enabled, 
shows that it will take at least 24 hours to render. :-(

-- 
Thomas

Post a reply to this message

On 15-3-2019 9:35, Thomas de Groot wrote:
> On 14-3-2019 13:28, Thomas de Groot wrote:
>> On 14-3-2019 8:43, Thomas de Groot wrote:
>>> The small issue I was talking about is the thin line of light visible 
>>> between the glass/lead and the window frame. It could be the window 
>>> being a tiny bit too small but I guess it is light "leaking" at 
>>> angles. Something similar is shown at the angle between floor and 
>>> wall. I dimly remember this phenomenon was discussed many years ago 
>>> and I do not remember the way to correct that, except, I believe, by 
>>> using stochastic anti-aliasing. I shall test that in any case.
>>>
>>
>> As I supposed indeed, stochastic antialiasing (with no_cache) solves 
>> the issue.
>>
> 
> The downside of this is that combining stochastic aa with photons, will 
> dramatically decrease render speed. A rough calculation for the image 
> above, with a crude setting of aa (+a0.1) and with photons enabled, 
> shows that it will take at least 24 hours to render. :-(
> 

Not precise enough I am afraid. I need to give you more relevant info:

+ The issue mentioned above was solved using UberPOV, without photons, 
and with no_cache on in the radiosity block. Command line: +w640 +h640 
+am3 +a0.01 +ac0.995 +r3 +bm2 +bs8 +wt6. Radiosity's count was lowered 
to 10. Render time seemed acceptably "low" (I didn't render a complete 
image).

+ The same settings using UberPOV, this time with photons on, the render 
time soared up to the estimate of 24 hours+.

+ Using the latest version of 3.8, and with identical settings for +am3 
on the command line (no_cache is /not/ available in this version), both 
with or without photons available, the render time was "low" i.e. 
acceptable for a test and within the hour. However, the issue mentioned 
above was *not* solved. I tried to increase dramatically the count value 
in the radiosity block but to no avail where the issue was concerned.

I would like some expert's view on the matter please.

-- 
Thomas

Post a reply to this message

Le 19-03-15 à 07:54, Thomas de Groot a écrit :
> On 15-3-2019 9:35, Thomas de Groot wrote:
>> On 14-3-2019 13:28, Thomas de Groot wrote:
>>> On 14-3-2019 8:43, Thomas de Groot wrote:
>>>> The small issue I was talking about is the thin line of light 
>>>> visible between the glass/lead and the window frame. It could be the 
>>>> window being a tiny bit too small but I guess it is light "leaking" 
>>>> at angles. Something similar is shown at the angle between floor and 
>>>> wall. I dimly remember this phenomenon was discussed many years ago 
>>>> and I do not remember the way to correct that, except, I believe, by 
>>>> using stochastic anti-aliasing. I shall test that in any case.
>>>>
>>>
>>> As I supposed indeed, stochastic antialiasing (with no_cache) solves 
>>> the issue.
>>>
>>
>> The downside of this is that combining stochastic aa with photons, 
>> will dramatically decrease render speed. A rough calculation for the 
>> image above, with a crude setting of aa (+a0.1) and with photons 
>> enabled, shows that it will take at least 24 hours to render. :-(
>>
> 
> Not precise enough I am afraid. I need to give you more relevant info:
> 
> + The issue mentioned above was solved using UberPOV, without photons, 
> and with no_cache on in the radiosity block. Command line: +w640 +h640 
> +am3 +a0.01 +ac0.995 +r3 +bm2 +bs8 +wt6. Radiosity's count was lowered 
> to 10. Render time seemed acceptably "low" (I didn't render a complete 
> image).
> 
> + The same settings using UberPOV, this time with photons on, the render 
> time soared up to the estimate of 24 hours+.
> 
> + Using the latest version of 3.8, and with identical settings for +am3 
> on the command line (no_cache is /not/ available in this version), both 
> with or without photons available, the render time was "low" i.e. 
> acceptable for a test and within the hour. However, the issue mentioned 
> above was *not* solved. I tried to increase dramatically the count value 
> in the radiosity block but to no avail where the issue was concerned.
> 
> I would like some expert's view on the matter please.
> 

The most obvious issue that I see is where the wall meet the floor. It 
looks like you are getting radiosity samples from the back of the wall.
Some possibility :
Make the wall go slightly lower than the floor.
Place another box inside the wall at the floor's level.
Add a plinth in front of the wall. It can make the scene more realistic 
at the same time.
Scale up the whole scene by some factor, like 10 times. If using spacing 
for the photons, increase it by the same factor.

If you have some problem with the window, try making the outer edge 
broader so that it goes into the red frame.


Alain

Post a reply to this message

On 15-3-2019 22:39, Alain wrote:
> Le 19-03-15 à 07:54, Thomas de Groot a écrit :
>> On 15-3-2019 9:35, Thomas de Groot wrote:
>>> On 14-3-2019 13:28, Thomas de Groot wrote:
>>>> On 14-3-2019 8:43, Thomas de Groot wrote:
>>>>> The small issue I was talking about is the thin line of light 
>>>>> visible between the glass/lead and the window frame. It could be 
>>>>> the window being a tiny bit too small but I guess it is light 
>>>>> "leaking" at angles. Something similar is shown at the angle 
>>>>> between floor and wall. I dimly remember this phenomenon was 
>>>>> discussed many years ago and I do not remember the way to correct 
>>>>> that, except, I believe, by using stochastic anti-aliasing. I shall 
>>>>> test that in any case.
>>>>>
>>>>
>>>> As I supposed indeed, stochastic antialiasing (with no_cache) solves 
>>>> the issue.
>>>>
>>>
>>> The downside of this is that combining stochastic aa with photons, 
>>> will dramatically decrease render speed. A rough calculation for the 
>>> image above, with a crude setting of aa (+a0.1) and with photons 
>>> enabled, shows that it will take at least 24 hours to render. :-(
>>>
>>
>> Not precise enough I am afraid. I need to give you more relevant info:
>>
>> + The issue mentioned above was solved using UberPOV, without photons, 
>> and with no_cache on in the radiosity block. Command line: +w640 +h640 
>> +am3 +a0.01 +ac0.995 +r3 +bm2 +bs8 +wt6. Radiosity's count was lowered 
>> to 10. Render time seemed acceptably "low" (I didn't render a complete 
>> image).
>>
>> + The same settings using UberPOV, this time with photons on, the 
>> render time soared up to the estimate of 24 hours+.
>>
>> + Using the latest version of 3.8, and with identical settings for 
>> +am3 on the command line (no_cache is /not/ available in this 
>> version), both with or without photons available, the render time was 
>> "low" i.e. acceptable for a test and within the hour. However, the 
>> issue mentioned above was *not* solved. I tried to increase 
>> dramatically the count value in the radiosity block but to no avail 
>> where the issue was concerned.
>>
>> I would like some expert's view on the matter please.
>>
> 

Thank you Alain, much appreciated. some answers:

> The most obvious issue that I see is where the wall meet the floor. It 
> looks like you are getting radiosity samples from the back of the wall.
> Some possibility :
> Make the wall go slightly lower than the floor.

That is already the case.

> Place another box inside the wall at the floor's level.
> Add a plinth in front of the wall. It can make the scene more realistic 
> at the same time.

That is certainly something to do.

> Scale up the whole scene by some factor, like 10 times. If using spacing 
> for the photons, increase it by the same factor.

That is an interesting idea to follow up upon. I seem dimly to remember 
now that this was the best solution given in the past. This time, I am 
going to write that down in my notes book. ;-) [and then forget about it 
of course]

> 
> If you have some problem with the window, try making the outer edge 
> broader so that it goes into the red frame.

That also is already the case. I shall see what happens when scaling the 
scene up.

Thanks again!

-- 
Thomas

Post a reply to this message

Thomas de Groot wrote on 13/03/2019 12:49:
> This is #2.
> 
> Basic frame texture and some small issues (code needs cleaning up).
A beautiful light.
Paolo

Post a reply to this message

On 15-3-2019 22:39, Alain wrote:
> The most obvious issue that I see is where the wall meet the floor. It 
> looks like you are getting radiosity samples from the back of the wall.
> Some possibility :
> Make the wall go slightly lower than the floor.
> Place another box inside the wall at the floor's level.
> Add a plinth in front of the wall. It can make the scene more realistic 
> at the same time.
> Scale up the whole scene by some factor, like 10 times. If using spacing 
> for the photons, increase it by the same factor.
> 
> If you have some problem with the window, try making the outer edge 
> broader so that it goes into the red frame.
> 

This image version has been scaled up x10. Initially, the bleeding did 
not disappear, only after I gave the walls a more complex texture was it 
reduced. I think that it was mostly the uniform pigment that was at issue.

The window's edge still shows the issue; I need to look deeper.

To brighten up the room, I gave the walls a tiny bit of emission.

Instead of aa, I used a bit of focal blur.

-- 
Thomas

Post a reply to this message

Attachments:
Download 'cive medieval_test_#2b.png' (464 KB)

Preview of image 'cive medieval_test_#2b.png'

Le 19-03-20 à 04:53, Thomas de Groot a écrit :
> On 15-3-2019 22:39, Alain wrote:
>> The most obvious issue that I see is where the wall meet the floor. It 
>> looks like you are getting radiosity samples from the back of the wall.
>> Some possibility :
>> Make the wall go slightly lower than the floor.
>> Place another box inside the wall at the floor's level.
>> Add a plinth in front of the wall. It can make the scene more 
>> realistic at the same time.
>> Scale up the whole scene by some factor, like 10 times. If using 
>> spacing for the photons, increase it by the same factor.
>>
>> If you have some problem with the window, try making the outer edge 
>> broader so that it goes into the red frame.
>>
> 
> This image version has been scaled up x10. Initially, the bleeding did 
> not disappear, only after I gave the walls a more complex texture was it 
> reduced. I think that it was mostly the uniform pigment that was at issue.
> 
> The window's edge still shows the issue; I need to look deeper.
> 
> To brighten up the room, I gave the walls a tiny bit of emission.
> 
> Instead of aa, I used a bit of focal blur.
> 

Try making the window edges a little bit thicker, or add some thin 
strips around it. The strips will act a little like the plinths at the 
bottom of the walls. Make them black.

Post a reply to this message

On 20-3-2019 16:25, Alain wrote:

> Try making the window edges a little bit thicker, or add some thin 
> strips around it. The strips will act a little like the plinths at the 
> bottom of the walls. Make them black.

That does not do the trick. Like the plinths in the room, the bleeding 
is just moved to the corner plinth/frame, as was the corner plinth/wall 
before I changed the wall texture. So, the solution lies elsewhere, but 
I do not know where at the moment.

-- 
Thomas

Post a reply to this message