What's the difference?

CGXel

What's the difference between this maps:

- Bump
- Normal
- Displacement

(I've read some articles about it, but I honestly don't fully understand it)

oskarkeo

Bump gives the illusion of depth but is actually flat
normal is the same as bump, but uses vector coordinates to allow you to 'relight' it giving better illusion of depth

displacement actaully shifts the polygons around.

CGXel

oskarkeo wrote: »

displacement actaully shifts the polygons around.

In what kind of situations displacement map is a good choice?, like, why wouldn't we just tweak the model instead?

Butthair

http://blog.digitaltutors.com/bump-normal-and-displacement-maps/


Omg. Google.

Obscura

Because when you use tessellation/displacement, you can make the geometry density to be view distance dependant, and it does the optimizazion automatically. The most common use of displacement is terrains in games, but it can be used on some tileable textures too or on characters. There is parallax, and silhouette parallax too, they also use "displacement map"/"height map" but these can be expensive, as well as the tessellation/displacement.

...But yeah

Butthair wrote: »

Omg. Google.