Such a simple thing yet I can’t figure out how to do this! I have some 3D models inside a box, they all have the aiWireframe shader applied to them, but I need the box to only display the lines of its edges and have its fill color be transparent. Is there a better way to do this? It doesn’t have to be aiWireframe, just need to make a simple animation revolving around the box and items showing everything in wireframe but the box faces to be transparent.
How do make Arnold "aiWireframe" have transparent fill color?
spire2
#2
Just use the aiWireframe output like a mask (fill color black, line color white) to drive the opacity of an aiStandardSurface. Don’t forget to turn off opaque in your objects’ shape nodes.
xmidnight8x
#3
“Don’t forget to turn off opaque in your objects’ shape nodes.” <— think I found my problem 
thank you!