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how to blend ?

i made sofa with 2 color maps.

1 map for other texture.

1 map for custom colors.

i want to combine them, so i can have the texture intact and custom color enabled.

so far lerp didnt work (the color blend all the texture.)

Try Multiply.

Multiply darken my model. It ruined entirely.

Here’s an example I made a while ago

https://youtube.com/watch?v=h9P6rPKPOxo

So the first texture in the material editor is the base color, the second is a packed texture with red being roughness, green being the tint mask, and blue which is the metallic.

Also to make it cheaper, replace the overlay with a multiply.

The base color should be mostly white where you’re changing the colors.

i find another way to fix this issue, thanks for helping though.