Custom Renderman Shaders & Realflow

I been writing a custom Renderman shader - it still needs work but here is the current code and examples as to what it looks like!

Video Examples:

Bob | Realfow Simulation | Custom Renderman Shader | Iskander Mellakh from iskander mellakh on Vimeo.

Custom Renderman Shader | Iskander Mellakh from iskander mellakh on Vimeo.

Here is the code:

1. surface im_mottleNoise(
2.           uniform color myColor = color(0,1,0);
3.           uniform float myOc = 0.1;
4.           uniform float roughness = 0.1;
5.           float Km = 1.0;
6.           float face = 1.0;
7.           float mag = 0.0;
8.           uniform float freqency = 1.0;
9. )
10. {
11.           float size = 1.0,
12.           magnitude = 0.0,
13.           i;
14.           point P2;
15.           P2 = transform ("shader", P);
16.           for (i = 0; i <6.0; i+= 1.0){
17.                    magnitude += abs (.5 - noise (P2 * size) * freqency) / size;
18.           }
19. 
    
20.           P2 = P - normalize (N) *(magnitude * magnitude * magnitude) *Km * mag;
21.           N = calculatenormal(P2);
22.           normal Nn = normalize (N);
23.           vector In = normalize(-I);
24.           normal Nf = faceforward(Nn,-I);
25.           normal Nb = faceforward(Nn,I);
26.           //Oi = myOc * diffuse(Nf * -face);
27.           //Oi = myOc * face + specular(Nf, In, roughness);
28.           Oi = myOc;
29.           Ci = myColor *Oi * diffuse(Nb) + specular(Nf, In, roughness);
30. }