An OSL Wood Shader for Blender Cycles

Support Materials and Textures
1

I tried my hand at Larry Gritz’ advanced renderman oak shader and adapted it for OSL:

LGwood1.png960×540 960 KB

you can find the shader code and example node setup here:

http://blenderthings.blogspot.com/2013/01/an-osl-wood-shader-for-blender-cycles.html

cheers

2

Great job

On your blog you mentioned the derivatives did not work for you, but I have been able to get them to work. There is a filterwidth.h header that I began to port to OSL, it’s not hard, and will allow you to do all of those antialiasing functions. There is also a noises header.

3

good to know those derivatives are working, it just means I have to study it some more:D

i also noticed that in order to make bump mapping work, a texturecoordinate inputnode must be present. What is your experience on this point?

4

Looks pretty good, especially the planks! I was thinking of trying to port my procedural wood to OSL one of these days.

5

please do, it is always nice to be able to compare different approaches. at the moment i am thinking how i could incorporate knots inthe tdxture so that maybe i czn texture some lower quality wood like pine (the oak shader is basically a warped cylinder of rings so just a trunk realy without any trace of side branches} maybe you or other members have already made some progress?

6

My approach was basically the same as yours: warped cylindrical rings with a color map. I was wondering about knots, too, but I haven’t had time to attack it. It seems like OSL has much more flexibility than nodes so it SHOULD be possible I would think.