lukaselmer / ethz-computer-graphics-brdf-2013

Computer Graphics Exercise 4 - BRDF and Procedural Textures

Computer Graphics Exercise 4 - BRDF and Procedural Textures

General

The project can be found under https://github.com/lukaselmer/ethz-computer-graphics-brdf-2013

A live demo can be found under https://brdf.elmermx.ch/

Two additional colors have been added for steel and hematite.

Inspiration for Perlin noise: https://github.com/ashima/webgl-noise

Implemented features

2. Lambertian

There are no highlights in this model, and thus neither steel nor hematite look as they should.

3. Phong

The Phong Lightning model introduces specular highlights. But the steel looks like plastic. Hematite doesn't look that bad.

4. Blinn-Phong

In this model, steel once more looks more like plastic. The hematite looks pretty nice.

5. Ward

Hematite looks better, but the steel still doesn't look good.

6. Cook

Finally the steel can be displayed correctly, as well as the hematite.

7. SVBRDF

Displays rusted steel. Additionally animated rust :) Uses Perlin noise for that.

A. Wood

Uses Perlin noise. It could be more realistic, but it looks quite nice. Additional implementation with Cook model.

B. Marble

Uses Perlin noise and looks very nice. Additional implementation with Cook model.

C. Earth

Uses 3D Perlin noise for the clouds, the islands, the icebergs, the whater (dark and light blue) and the bump mapping. The clouds are animated. Bump mapping is implemented, but doesn't look very realistic because the earth is still round around the edges. This is because it is a "fake" implementation with only changing the normals at certain points. Additionally implemented: Icebergs (as "islands", like the north pole) and glaciers (on the normal islands). Additional implementation with Cook model and Ward model.