Blending textures?

Development Rendering
1

Hi! New to the forum and UE4.

I want to create a material where at least two areas of my surface have different roughness. My plan was to create a rgb mask and use the rgba channels to define these parts of the surface and use a multiply or something so I can change the different roughness levels in unreal so I dont have to resave the texture every time. So from my mask I want to create a grey image in unreal where the areas have different values and I can controll each of these values.

On top of this I want to add a bitmap to create some variation in the roughness. I would like to be able to control how much effect this bitmap have.

Is this possible and how is it done?

Best regards

2

Check out the last part paragraph of thistutorial
Basically you should use a “Lerp”(Linear Interpolation) node which will blend two different values based on third(Could be a texture, solid color and etc)