 |
|
|
|
|
|
| |
| |
|
|
|
|
| |
| |
|
|
Hi,
This is my try at a classic subject: cut gemstone on a flat white plane.
It could have turned out better, since the light and gem positions
aren't as good as they could be.
The brilliant cut was modeled from actual specs using TopMod and
LightWave. I then dropped it onto a plane using Blender. That last step
is really handy, since you can drop all kinds of objects onto different
surfaces using the game engine.
The ior and dispersion settings were obtained from NewIOR.inc by
Sven-Erik Andersen.
The whole thing took about an hour to render. Not too bad when you've
got 10505000 photons, 50 focal blur samples, a max_trace_level of 31, 7
dispersion samples and HDR-based post-processed glare. But I cheated and
used Rune's illusion.inc to pre-render the plane with caustics.
It's a lot of work for a diamond that isn't quite as brilliant as I had
hoped...
Sam
Post a reply to this message
Attachments:
Download 'diamond.jpg' (101 KB)
Preview of image 'diamond.jpg'
|
|
| |
| |
|
|
|
|
| |
| |
|
|
Brilliant, in every sense!
Post a reply to this message
|
|
| |
| |
|
|
|
|
| |
| |
|
|
>stbenge on date 11/09/2009 21:05 wrote:
[...]
> It's a lot of work for a diamond that isn't quite as brilliant as I had
> hoped...
>
> Sam
Mmm.
It is anyway impressive!
Now... adding a little panther shape in the diamond and turn the color
to pink you are ready for movie effects...
;-)
Paolo
Post a reply to this message
|
|
| |
| |
|
|
|
|
| |
| |
|
|
clipka wrote:
> Brilliant, in every sense!
thanks!
Post a reply to this message
|
|
| |
| |
|
|
|
|
| |
| |
|
|
Paolo Gibellini wrote:
> >stbenge on date 11/09/2009 21:05 wrote:
> [...]
>> It's a lot of work for a diamond that isn't quite as brilliant as I
>> had hoped...
>>
>> Sam
> Mmm.
> It is anyway impressive!
> Now... adding a little panther shape in the diamond and turn the color
> to pink you are ready for movie effects...
> ;-)
Maybe even a tiny reflection of Clouseau...
Post a reply to this message
|
|
| |
| |
|
|
|
|
| |
| |
|
|
stbenge wrote:
> Hi,
>
> This is my try at a classic subject: cut gemstone on a flat white plane.
> It could have turned out better, since the light and gem positions
> aren't as good as they could be.
Well done :)
Looks like I'm inspiring some people ;)
Post a reply to this message
|
|
| |
| |
|
|
|
|
| |
| |
|
|
Mike Raiford wrote:
> stbenge wrote:
>> Hi,
>>
>> This is my try at a classic subject: cut gemstone on a flat white
>> plane. It could have turned out better, since the light and gem
>> positions aren't as good as they could be.
>
> Well done :)
>
> Looks like I'm inspiring some people ;)
Well, yeah :) Minerals have always been a big thing with me. Slowly I'm
building up a collection of rendered stones, and some of them will be
cut. I use KrystalShaper to get the angles of natural stones. Some will
need to be cut stones or cabochons. Peridot (my stone), for example,
will probably need to be a cut gem since in nature it seldom forms nice
crystals. Rough stones with corroded surfaces are difficult to model
accurately1.
Cut gems seem to be a hard subject to render. A diamond, like mine, when
rendered in such a way as to produce a brilliant white flash, will
inevitably turn out looking, well, washed out :( Proper use of a high
dynamic intensity range with glare might help, but I think I might have
to include radiosity and exaggerated defocusing settings to really make
it look real.
Your macros look promising. It would appear you are following guidelines
very precisely.
You know, my uncle was a great gem maker. He (and Time books) is the
reason I got into minerals in the first place. He would bring tourmaline
from Pala, California to show me. Great stuff! I used to just get lost
looking at different stones.
It's a fun subject :)
Sam
Post a reply to this message
|
|
| |
| |
|
|
|
|
| |
| |
|
|
stbenge wrote:
>
> Well, yeah :) Minerals have always been a big thing with me. Slowly I'm
> building up a collection of rendered stones, and some of them will be
> cut. I use KrystalShaper to get the angles of natural stones. Some will
> need to be cut stones or cabochons. Peridot (my stone), for example,
> will probably need to be a cut gem since in nature it seldom forms nice
> crystals. Rough stones with corroded surfaces are difficult to model
> accurately1.
Ah, I've actually played around with KrystalShaper a bit. Your
tourmaline rendering was very nice. Looks like a nice chunk of crystal.
> Cut gems seem to be a hard subject to render. A diamond, like mine, when
> rendered in such a way as to produce a brilliant white flash, will
> inevitably turn out looking, well, washed out :( Proper use of a high
> dynamic intensity range with glare might help, but I think I might have
> to include radiosity and exaggerated defocusing settings to really make
> it look real.
Indeed. I'm striving to create gemstones that render nicely, I hope I
can achieve that. Some of my test renders are showing promise, but I
have not created a round brilliant cut, yet.
> Your macros look promising. It would appear you are following guidelines
> very precisely.
I'm following what I can scrounge up on the net. ;)
I've rewritten my macros to be based on a set of faceting macros, Makes
easy work out of the stones, now. The faceting uses indexing, so you
should be able to use the cutting schedules output by GemCad to get a
cut stone in any design. The only guesswork will be on facet distances,
which will either be a painful process or, if you know what you're doing
it may be easy. We'll see..
The modifications will now allow you to specify things like crown and
pavilion angles, which as you know are essential to getting brilliance
in a cut stone.
> You know, my uncle was a great gem maker. He (and Time books) is the
> reason I got into minerals in the first place. He would bring tourmaline
> from Pala, California to show me. Great stuff! I used to just get lost
> looking at different stones.
Wow :) That would be very cool. I've got a very small collection of a
couple varieties of quartz, but got really excited when I went to a
museum in Memphis and saw they had a pretty extensive mineral
collection. I photographed my favorites. I'm kind of a science nerd,
which may explain why I like my minerals.
Looking at the refractions on the Lithma renderings I did recently
really got me thinking about doing minerals and cut stones in POV-Ray.
Inspiration is funny that way.
> It's a fun subject :)
Most definitely :)
Post a reply to this message
|
|
| |
| |
|
|
|
|
| |
| |
|
|
Mike Raiford wrote:
> stbenge wrote:
>> I use KrystalShaper to get the angles of natural stones.
>
> Ah, I've actually played around with KrystalShaper a bit. Your
> tourmaline rendering was very nice. Looks like a nice chunk of crystal.
I have only the demo version which doesn't allow me to export meshes. I
can still find the angles though, and use them in POV or a modeling program.
Post a reply to this message
|
|
| |
| |
|
|
|
|
| |
