Many times while messing around and experiment with DS4 I’ve tried altering bump maps in the surfaces tab and it never seems to change anything. What purpose does it serve and how do I use it?
In short bump maps alter the way the surface responds to light. Think of how light catches in dips and grooves and reflects off of bumps. Bump maps capture that by faking the lighting effect. The surface remains flat, but it will look like it has more dimension because it responds better to the light.
Normal maps are another form of bump map, but instead of just up and down, they can reflect light in all kinds of directions based on the vectors in the map. In that way they’re sort of an advanced form of bump map, but also a bit harder to create as a result.
If you give us some information on the settings and the sort of bump map you’re using, we might be able to help you get better results.