POV-Ray : Newsgroups : povray.binaries.images : Dandelion : Re: Dandelion Server Time
1 Aug 2024 08:19:31 EDT (-0400)
  Re: Dandelion  
From: Robert McGregor
Date: 13 Oct 2008 20:50:00
Message: <web.48f3eb64ab533c2cbd1b3ad10@news.povray.org>
"Bill Pragnell" <bil### [at] hotmailcom> wrote:
> He he he, my leaf macro now has uv coordinates. This is a big improvement!


Okay, this is really cool Bill, keep it coming!

The UV coords will make it much more fun at the texturing stage. That said, I've
been playing around with ways to make lighting look more realistic on leaves and
such, but it's given me quite a headache - the old double_illuminate trick just
doesn't cut it for stuff like this.

It's a really complex problem because typically the front side can range from
velvet-diffuse to highly specular, but the back side is usually highly diffuse,
with a lot of subsurface scattering. It really requires a two-sided texture to
be believable, with variable translucency based on the angle of light to the
surface normal. Reflectance when viewed from the front side (convex),
transmissive SSS when viewed from the rear (concave)...

Hey Sam, you have this figured out yet?

-Rob :)


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