Can I use a decal as an opacity mask for the mesh it is projected onto?

Development Rendering
1

Hi,

I don’t know if my question is clear.
I mean: can you use a decal to “cut holes” of any shape on the surface of the mesh where it is projected?
For example:

  • the decal would use a black and white texture, let’s say a black circle on a white background.
  • Once projected on a mesh, let’s say a wall, there would be a round hole on the wall surface.

I found nothing about this on docs or threads so I think it’s not possible. However, I ask the question as I remember threads in old UDK forums where there were
discussions about this and that seemed possible at this time.

Cheers
E.D.

2

Short answer: No. Thats not how decals work…
The only way would be using a real oacity mask insie the wall material.

3

Or work with per pixel displacement or with a POM mask.

4

:

Yes, that’s what I thought.

@ryan20fun:
I’ll dig into this. Before searching, do you have any thread in mind about POM masks?

Anyway, thanks for your responses.

5

Sorry, Your reply got buried in my inbox.

I don’t have any, I can only suggest looking at the content examples and the Docs.

How is it going?

6

I temporarily solved it by using good old opacity masks, as I’m focusing on other aspects of my projects.