Add a "Exists" socket to the Color Attribute node in Shader Nodes
Right now there doesn't seem to be a way for Shader Nodes to check if the mesh has vertex paint and output an alternative color if the vertex paint isn't there.
It'd be great if the Color attribute node had an
Exists
socket:
A practical example is having a node setup that would output the object's
Object Color
if the color attribute doesn't exist.
Right now this is not possible:
Workbench shading already does this when in
attribute
mode: if an object doesn't have an active color attribute, then it uses the object color.
2 Comments
Just this morning I was working on something, and wishing I had this sort of Switch Node exactly like this.
It's helpful when you are using a geonode to create an attribute for a shader, but for Reasons you want to temp disable the genode, but have a fallback value for the shader. So instead of returning Null (or whatever it's receiving), it would FALSE over to whatever is in that input.
Still dearly looking for this.
I'm simulating another renderers shader which uses vertex colors for gamma correction. The default value is a 0.5 gray value (normal gamma), but if the attribute does not exist, the value fed to the shader will be 0.0 (0 gamma -> complete blackness). There's no perfect way to get a fallback or check in the shader at this time.