Thanks Alain and Darren of suggestions.

Thought I'd share what I have so far. I'm getting some artifacts with the 
glass container, and the upright connectors (lathe objects), perhaps my 
Bishop skills need further development. I DO have sturm on  but don't know 
where they (artifacts) are coming from ... perhaps viewing angle, or 
lighting angle

Jim

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Jim Holsenback wrote:
> Thanks Alain and Darren of suggestions.
> 
> Thought I'd share what I have so far. I'm getting some artifacts with the 
> glass container, and the upright connectors (lathe objects), perhaps my 
> Bishop skills need further development. I DO have sturm on  but don't know 
> where they (artifacts) are coming from ... perhaps viewing angle, or 
> lighting angle
> 

I’ve noticed that even with the sturm flag set, I often get artefacts in 
line with the horizon. I wonder if changing the orientation of the scene 
would help. I can’t remember many problems with Moray which uses Z = up.
That is pretty expensive marble you’re using with the grain running from 
one block through to another. You can add a degree of randomness (if you 
are using B3D’s Object Array) by adding a small degree of Rot Axis Offset.
Nice modelling BTW. Is the shape of the hourglass from RL?


-- 

Best Regards,
	Stephen

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"Stephen" <mca### [at] aolDOTcom> wrote in message 
news:4b827e01$1@news.povray.org...
> I’ve noticed that even with the sturm flag set, I often get artefacts in 
> line with the horizon. I wonder if changing the orientation of the scene 
> would help. I can’t remember many problems with Moray which uses Z = up.

thanks for the tip ... I'll give that a try!

> That is pretty expensive marble you’re using with the grain running from 
> one block through to another. You can add a degree of randomness (if you 
> are using B3D’s Object Array) by adding a small degree of Rot Axis Offset.

ha-ha ... yes the texture was just a quick and dirty effort for now,
I have a little random routine that I had not cloned from another scene yet!

> Nice modelling BTW. Is the shape of the hourglass from RL?

yes ... it WAS in the shop last year and didn't sell. I liked it so it's on 
my desk now ;-)
I'm having a good time with Bishop and I like it. Modelling in general is 
hard and it takes a lot of patience. I've also had to get in the habit of 
saving more often especially when I finally get something looking like I 
want.

Jim

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Jim Holsenback wrote:
> "Stephen" <mca### [at] aolDOTcom> wrote in message 
> news:4b827e01$1@news.povray.org...
>> I’ve noticed that even with the sturm flag set, I often get artefacts in 
>> line with the horizon. I wonder if changing the orientation of the scene 
>> would help. I can’t remember many problems with Moray which uses Z = up.
> 
> thanks for the tip ... I'll give that a try!
> 

It didn’t work for me. :(

>> That is pretty expensive marble you’re using with the grain running from 
>> one block through to another. You can add a degree of randomness (if you 
>> are using B3D’s Object Array) by adding a small degree of Rot Axis Offset.
> 
> ha-ha ... yes the texture was just a quick and dirty effort for now,
> I have a little random routine that I had not cloned from another scene yet!
> 

I’ve been meaning to spec a variant to the object array that adds a 
random variation to the objects, for a while. Also a tab to translate 
the texture would be useful.

>> Nice modelling BTW. Is the shape of the hourglass from RL?
> 
> yes ... it WAS in the shop last year and didn't sell. I liked it so it's on 
> my desk now ;-)

The glass seams less “teardrop” shaped than I’ve seen before. Very 
attractive, though.

> I'm having a good time with Bishop and I like it. Modelling in general is 
> hard and it takes a lot of patience. 

I’m glad that you like it. I’ve spent a long time, along with your 
countryman StephenS, guiding its development. Wait until you try the 
animation features ;)

> I've also had to get in the habit of 
> saving more often especially when I finally get something looking like I 
> want.

Hint: When you save a scene the last save is renamed as MyScene.bak, so 
you can revert by renaming the extension to .bsp. Also, I like the Undo 
Multiple feature.

-- 

Best Regards,
	Stephen

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"Stephen" <mca### [at] aolDOTcom> wrote in message 
news:4b82e6f5$1@news.povray.org...
> Jim Holsenback wrote:
>> "Stephen" <mca### [at] aolDOTcom> wrote in message 
>> news:4b827e01$1@news.povray.org...
>>> I’ve noticed that even with the sturm flag set, I often get artefacts in 
>>> line with the horizon. I wonder if changing the orientation of the scene 
>>> would help. I can’t remember many problems with Moray which uses Z = up.
>>
>> thanks for the tip ... I'll give that a try!
>>
>
> It didn’t work for me. :(

I had camera y and look_at y the same. A couple of degrees of x rotation 
made most of the artefacts go away, the rest appear to be ripples in the 
lathe shape itself. I imagine a few more strategic points probably wouldn't 
hurt!

Jim

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Jim Holsenback wrote:
> "Stephen" <mca### [at] aolDOTcom> wrote in message 
> news:4b82e6f5$1@news.povray.org...
>> Jim Holsenback wrote:
>>> "Stephen" <mca### [at] aolDOTcom> wrote in message 
>>> news:4b827e01$1@news.povray.org...
>>>> I’ve noticed that even with the sturm flag set, I often get artefacts in 
>>>> line with the horizon. I wonder if changing the orientation of the scene 
>>>> would help. I can’t remember many problems with Moray which uses Z = up.
>>> thanks for the tip ... I'll give that a try!
>>>
>> It didn’t work for me. :(
> 
> I had camera y and look_at y the same. A couple of degrees of x rotation 
> made most of the artefacts go away, 

Actually Thomas deG once recommended that you should roll the camera a 
bit, for artistic effect.

> the rest appear to be ripples in the 
> lathe shape itself. I imagine a few more strategic points probably wouldn't 
> hurt!
> 

That sometimes helps as well ;-)

-- 

Best Regards,
	Stephen

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"Stephen" <mca### [at] aolDOTcom> schreef in bericht 
news:4b84247d@news.povray.org...
>
> Actually Thomas deG once recommended that you should roll the camera a 
> bit, for artistic effect.
>

hehe! Indeed...  :) just a couple of degrees.
It more or less simulate the fact that nobody is holding a camera perfectly 
level. And it adds an extra, unconscious, tension to the image that is 
difficul to trace back to its origin if you are unaware of the trick.

Thomas

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