Hi,

I did some experiments on procedural wood texture and here is the 
resulting image (I used glass from Jaime Vives Piqueres website).

I got problem ("coincident surface like" bug) when I tried to 
incorporate some information onto the image using "screen.inc" and 
particularly the Screen_Plane macro. Here is the original macro:

#macro Screen_Plane (Texture, Scaling, BLCorner, TRCorner)
    box {
       <-0.000001,-0.000001,0>, <+1.000001,+1.000001,0>
    ...

This is basically a box with no thickness. Is that intended or is my 
file somehow out of date ?

Anyway, I had to slightly modify it to get clean color bands:

#macro Screen_Plane (Texture, Scaling, BLCorner, TRCorner)
    box {
       <-0.000001,-0.000001,0>, <+1.000001,+1.000001,0.000001>
    ...


I can post image sources if anyone interested.


Nico

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