Layered Materials - Opacity Mask Not Working

beefaroni

Hi everyone. I'm trying to use a opacity alpha (black and white) plugged into a MatLayerBlend_OverrideOpacityMask for a layered material. When I use the mask in a standard material, it works; however, it doesn't seem to work in the layered material. This question has been posted before but it was never resolved.


https://answers.unrealengine.com/questions/52024/layered-material-use-opacity.html

beefaroni

Also, here are some images that show the two setups (one working, one non-working).

Working (basic):



Non-working (layer_blend):

beefaroni

Fixed:

punchface

I think I'm having this same issue but the image on imgur won't load. Can somebody who has beefaroni's solution image here reload it? Pretty please?

Obscura

The solution for this is to plug 1 (constant) into "mask".

beefaroni

Man this was a long time ago!

I see what I did now.

Originally, I tried to plug the material function with the additions directly into the output. That wasn't working. I ended up having to break it all down and then re-attaching it.

Hope this helps

 

Obscura

beefaroni said:

Man this was a long time ago!

I see what I did now.

Originally, I tried to plug the material function with the additions directly into the output. That wasn't working. I ended up having to break it all down and then re-attaching it.

Hope this helps

 

From what I see, the explanation and the error is this:

You plugged the opacity mask into the mask that drives where to change the opacity(mask). This isn't used to tell the actual opacity of the material, but it tells where it will be blended. I could be wrong though.

beefaroni

Ooh that makes sense. I now know 3 years later why that fix actually worked

IacopoAntonelli

Obscura said:

beefaroni said:

Man this was a long time ago!

I see what I did now.

Originally, I tried to plug the material function with the additions directly into the output. That wasn't working. I ended up having to break it all down and then re-attaching it.

Hope this helps

 

From what I see, the explanation and the error is this:

You plugged the opacity mask into the mask that drives where to change the opacity(mask). This isn't used to tell the actual opacity of the material, but it tells where it will be blended. I could be wrong though.

No, you are right! The solution is putting the texture in new opacity mask input directly and its inverse (using 1- node) in the mask input.