how to get a shader that is only visible on light?

[JayHoo]

I had one solution which works with directional light. When I am at home I can search for it.

[moonangel]

you could try this:
create a lambert, color white, diffuse 1.0,
connect its outColor to a reverse node,
connect the reverse node output to your final shaders transparency

[tostao_wayne]

I had one solution which works with directional light. When I am at home I can search for it.


Thanks Jayhoo,


moonangel, i have try your idea, it dind't work for me, the ambient ilumination makes the lambert not to be black in shadows

[royterr]

connect a "surfaceluminance" node to a "reverse" node (out value - input x,y,z) and connect this node to the transoarency (output - transparency) of your shader. It should give you exactly what you want.

[lacluna]

Easy: create a render pass where your object is either illuminated with white light or completely black. Then, use that as a mask to make him transparent on the black parts and opaque on the white.

[JayHoo]

i used royterr`s method with the help of the layered shader.

[tostao_wayne]

thanx jayhoo, royter and lacluna, the two methods are good for me.

[CGTalk Moderation]

This thread has been automatically closed as it remained inactive for 12 months. If you wish to continue the discussion, please create a new thread in the appropriate forum.