Above is the rendered version of the self shadowed clouds. Its an edit of the shadowedclouds.sl in the renderman book, but ive added :
- rotPP (which needs rotateAxisPP to work also)
More examples below. sorry about rushing these examples but you get the idea. The next image is with 3 octaves of noise, you have to decrease the step size to see it, in this example it went from 0.1 down to 0.05 before more noise was visible.
Then the image after that is with mo blur but back on 2 octaves.
Here is the example scene used.
And youll need to put this .sdl in your shaders folder for 3delight.
You have to add the per particle attributes and make them spheres for this to work. Also you need a 3delight attr with those particle attrs added to it. See the example scene for a demo.