Decal

[javierrentas]

I have a couple of questions about decals.
1. Do decal is working with RTX GPU rendering? I'm getting a black result if I use a material with a texture and the decal is not visible if I use a mask. CPU is working good





2. How do I rotate-mirror the decal? In my test (CPU) the logo seems to be mirror and I have no idea how to fix it. The correct result should be as in the texture preview.

[javierrentas]

I found that if I mirror the decal dummy object I could mirror the decal.

[javierrentas]

Do you guys know the answer to the first question in my post about Decals and GPU RTX rendering?

[konstantin_chaos]

Hi javierrentas,

The described scenario works as expected for me:


Can you share an example scene that shows the problem?

Konstantin

[javierrentas]

Hi Kotse,
I did another test and I'm getting the same result as before
Decal CPU


Decal GPU RTX


Here is the scene:
https://drive.google.com/file/d/1zsJ...ew?usp=sharing

[konstantin_chaos]

Thanks for the scene!
I was able to reproduce the issue as described and found what's causing it.
Once again the On-demand Mipmapping option is the reason.
Using full size textures fixes it:


I'll log a bug for this.
And excuse us for the inconvenience.

Konstantin

[konstantin_chaos]

Another solution for this I found is just applying the Decal material to another scene object (not a decal).
It seems that V-Ray GPU is not generating mipmaps for materials applied only to Decals...

[javierrentas]

Hi Kotse,
Thank you for the solution. I'm glad you guys found a workaround. Thank you!