Creating bump maps for custom textures

- Bump maps are black and white images…you can use to simulate texture on a 3D object.…Now notice I used the word simulate.…They don't actually create any added geometry,…so they're really fast.…But they do do a great job of simulating texture…on your 3D objects, they just don't slow down…your render in the process.…Now once you've created a seamless texture,…that's just usually the start of the process.…If you want to add a little more realism to the material…you've applied to your 3D object, you need to add…a bump map.…

Now one of the cool things about Photoshop…is the fact that you can actually save bump maps…directly out of Photoshop.…All a bump map is, is a black and white representation…of depth.…Whatever is white is gonna kind of bump out.…And whatever is dark is gonna kind of bump in.…With my background layer selected,…I could go up under Filter, and if I go down to 3D,…I could choose Generate Bump Map.…It's just gonna look at the color values…and create a bump map.…Now if I wanna save this, I'm just gonna go up under File.…