How do i add a transparent texture over my material? I am trying to add this rust texture that I found over my brick texture cube. The rust is transparent, and i am selecting a specific area of the cube to have the rust over. I separated the specific faces i wanted the rust on by material, and i added the rust image texture, then plugged it to the roughness node. All that appears is a white square. I tried to texture paint but it doesn't give me the result i want. I followed other tutorials where it said to put both the image textures for (in this case brick and rust) through a mixRGB node, but then the rust appears everywhere on the cube. I tried a different method, this time doing what i mentioned again but in it's own material, (separating the faces, giving it its own material, then adding two images textures, brick and rust, then going through the mixRGB node) which did a bit better, but the brick texture was being stretched whenever i tried to adjust the image in the UV editor. What other solutions are there that i can try out?
(I got the idea of putting the rust on the roughness node from Blender Guru's video on making a subway in 20 mins, but i did not get the same results. The Color Ramp did not change much for me.)
Here - This is a common setup for mixing 2 textures (especially rust, as the noise texture works well to create random &quot;rusty patches, however I used concrete here). You can also use your own texture (if it has a built in alpha, connect as shown). Sometimes as well, texture packs come with alpha &quot;masks&quot; that are their own separate texture. You connect these as a factor the same way. Ultimately, any B&amp;W image can be used as a mix factor. Play around to get what you like. See below:
This is all done on one plane with only one face.

Also, it's a bit hard to follow what you were doing with the roughness thing, however, if you have a roughness map, and want to apply it &quot;correctly&quot;, mix the maps together with the same mix factor.