Image 2 set some color on the cloud color material parameter everithing is ok
Image 3 set parameter back to white and connect to cloud color (diff) a color constant (red) with the same value as before, oups the opacity is overriden
Image 4 seeing that Cd is multiplied by diff inside the shader, I connect my color constant to it (green this time)same punnishment as before… it renders all the active tiless of the vdb qith a density of 1…
But is it only the case with volume shaders? I don't have to connect other parameters (like normal for instance) in a surface shader when I use a custom parm ..
This is the case will all shaders (nodes that output surface/displace). Normal and Position are exempt; they are global variables, not bound attributes. UV, color (Cd), and alpha are all bound attributes and would need to be passed as parameters as well.