Using Vertex Alpha to control Transparency

Development Rendering
, , , , , ,
1

Hi all, I am trying to use a custom mesh as a decal, and control the transparency/opacity with vertex alpha, is this possible? I do not want a translucent material, I want it to be lit as normal, like chipped plaster or damaged brick, but the mesh can be what I define, rather than using the deferred decal thing. Cheers

2

Set the blending mode of your material to masked, add the vertex color node and plug the alpha channel into the opacity mask.

3

Thanks, but that creates a cutout effect with no blend, it’s a 0 or 1 effect and looks awful.

4

Try setting the blend mode to translucency and pin the alpha to the opacity slot instead of the opacity mask slot.

5

Thanks again, but that disables the roughness nodes and creates a translucent material, which is not what brick or plaster is. Though the vertex blend is actually what I’m looking for, the texture comes out unlit, and therefore, unusable.

I basically want the vertex blend that works with translucency, but without it having to be translucent!

6

Hey, did you ever resolve this? I am trying to do the exact same thing, it seems

7

Try using the Dither Temporal AA node for the opacity mask.

https://forums.unrealengine.com/attachment.php?attachmentid=124191&d=1483845892

8

Try using the Dither Temporal AA node for the opacity mask.