Patina Metal

[Kranda]

I am looking to apply a patina texture similar to the below picture to basically a cube. When I try and apply similar textures to large flat surfaces they don't look very good.  I'm guessing it is because the materials are using a curvature material to generate an opacity map to map the patina vs the metal color. I thought of a workaround by exporting a UV of the cube shape and manually creating a mask for the image. If anyone has a better idea for quickly doing this let me know.


Example of patina metal on a complicated model

http://imgur.com/a/QABBy
What a cube looks like with a similar texture applied

[Will Gibbons]

I'd tackle this by starting with a bump texture... then using either curvature or occlusion (as opacity as you mentioned) to show the underlying metal material.