Hi there,
I've been following this tutorial on an Infection / Growth system within Houdini; and the teacher is using Redshift. I believe Arnold is capable of doing the same thing here, but essentially they are using a layered shader in Redshift to switch between two materials once an object gets displaced; in this case a displacement occurs and slowly encompasses the entire surface of the object, and the displacement is one texture while the non-displaced geometry is a different one.
I'm sure there is a simpler way to explain this, and the tutorial does a fantastic job, but I can not seem to get the arnold equivalent nodes to behave similarly to the Redshift ones.
Any guidance would be much appreciated!
@ https://www.youtube.com/watch?v=Q450hTAmysc
I would say whatever is driving the displacement should drive the shading eg where there's zero disp, use one shader, where there's non-zero disp, use another shader.
I did enough of the tutorial to move on to the shading.
The user data node gets the burn attribute.
I'm using layer_rgba and utility shaders (one with color=white and one with color=prims), but you would do the same thing with standard_surface and layer_shader.