On 8-3-2018 8:21, mathzhaoliang wrote:
> 
> This is my work here:
> 
> https://github.com/zemora/penrose_rubic/blob/master/penrose.png?raw=true
> 
> I'm not very satified with it because I think it's not as realistic as I want. I
> tried to reproduce the image here:
> 
> http://scorpius.github.io/large/pov-3puzzles.jpg
> 
> but my work is still not as good as there. One problem may be with the "grout",
> I used plain White plane and
> 
> { ambient 0.1 diffuse 0.6 specular 0.6 roughness 0.1}

Where the grout is concerned, you could use a normal with your texture. 
Example:

plane {
   y, 0
   texture {
     pigment {rgb 1}
     finish {
       ambient 0
       diffuse 0.6
       specular 0.6
       roughness 0.1
     }
     normal {
       granite 0.5
       scale 0.0001
     }
   }
}

If you are using version 3.7 and up, I suggest you always use ambient 0 
(or leave it out of the finish). You can vary the strength of the 
granite normal by increasing/decreasing the value. The scale in the 
example is set for micronormals. Play with it by increasing/decreasing 
the value until you are satisfied.

-- 
Thomas

Post a reply to this message