Where to place Opacity map of decal?

Rendering
1

Hi

Decals_ujznddlv_atlas_Preview
Decals_ujznddlv_atlas_Preview720×720 79.3 KB

I download this decal on Megascan website. There are Albedo and Opacity Map. I’m intent to place this decal on a wall, It mean need wall material and decal.

I select object then select Decal tab, I only can place Albedo map, where could I put Opacity map?
Or other method to create Decal in Rhino 7?

Attached file
Decals_ujznddlv_2K_atlas_ms.zip (1.6 MB)

Thank
Travis

2

Combine them in your favourite image editor and save out as PNG with alpha channel.

For instance with GIMP:

image
image1920×818 204 KB

The edited decal
The edited decal1000×1000 145 KB

image
image885×562 75.9 KB

Addendum for a bit more control over the texture if the decal is the only texture you’re going to have:

3

Thank Nathan for advices
I did it

image
image536×596 34.9 KB

I found this guide for photoshop
How to merge opacity map to diffuse map as alpha channel - YouTube

Travis