What nodes do I need to get a worn paint material?
That could cover a whole range of possibilities so you might want to be a bit more specific and perhaps given an example image.
However a simple search brings up stuff like this:
As I see it, this has 4 elements:
- the paint material
- the material under the paint
- the mask that controls that is paint and what isnt.
- the edge between the paint and non-paint: at the simplist the paint is higher on a bump-map, and the most complex you take into consideration multiple layers of paint, each in their own state of pealing away.
What material would you recommend for this tank?
I made this tank, but it is currently using diffuse maps with no texture or material.
How do I change the color of a PBR?
I usually place a HSV node (Hue Saturation Value) after the diffuse or albedo texture. By changing the hue slider you change the color.