Just starting playing around with Blender in the spare time, and have now started to us map and adding custom textures, and I have a quite noob question.
I wonder what would be the best / smartest way to add dirt to a car, like on the attached model car? So not dirt like the type in corners and joints, but more som splash and insects.
I now have a texture that contains the color and graphics, but I guess I should not paint dirt into this map, as the dirt will be as reflective as the rest of the car.
Should I add the dirt as a transparent texture map? Or how is it best done?
There are many ways to do it depending on what you need.
You could create a complete separated shader with transparency and put it on top.
You could bake the information into your color and roughness texture.
You could mix the color textures in the node editor using MixRGB nodes.
Each method has pro and cons.
Baking these directly into the other textures is probably the least flexible solution.
Looks good, but i would remove the dirt behind the lamp glass - it’s unrealistic because it doesn’t gets dirty if it is behind glass.
Also maybe add some variation in the dirt color - just to break it up a little further - and add some bump by using a normal or bump map if you get really close with the camera.
