From: gonzo
Subject: Re: Tree Stump [190k]
Date: 7 Jun 2003 01:57:46
Message: <3ee17eda@news.povray.org>
Christoph Hormann <chr### [at] gmxde> wrote in message
news:3EE0AE37.2D5006B2@gmx.de...
> The colors are from real trees - i don't think it's too saturated> (although a lot of trees are more grayish of course) but bark has some> pretty complicated reflectivity properties and the geometry mostly is> quite tricky as well (often there is a layered structure leading to pretty> flat and shiny 'plateaus' between rougher parts).
Yes, bark is usually weathered and smoother on the outside surface, and
darker and rougher in the cracks. I'm still learning POV textures but is it
possible to have a cylindrical or radial gradient? Then you could use a
layered texture & normal map to do the same thing.
Great pic, though!
RG
Christoph Hormann <chr### [at] gmxde> wrote:
> I am still struggling with the bark finish - it does not appear very> realistic but i am not sure if it's mainly the finish or the surface> structure.
Hi Christoph. Thanks for the fast reply and link to this thread. Although
it's already an older image the only thing that strikes me as odd in this
image is the depth of the rings on top of the stump. I haven't seen this in
real life (not seen is ofcourse not the same as not possible). All stumps
I've seen usually have a flat top (except for the occasionally higher parts
created by multiple chops or near the outer rings, parts where the tree
broke off in the end). But I haven't seen rings with depth yet.
But anyway .. it's way beyond my capabilities for now. I will try making a
plane covered with grass first :)
Best regards,
NumbC