Bump

        texture bump scale
Bump attempts to produce the effect of a bumpy surface, but it should be noted that the bumps do not cast shadows. The bumps range in size from 0 to scale; it is often useful to also use scale on the whole texture (this would allow you to scale it differently in different directions), for example:

        object column texture bump 3 scale 3 9 20.
A good example bump texture can be found in the section on the
plane primitive.

Figure 7-2

        /*
           bump.ray
           Bump Example
           Stephen Peter 12 Feb 93
        */
        eyep 0 -1 75
        lookp 0 0 0
        light 1 point 40 -40 40
        screen 300 300
        background .9 .9 .9

        surface blue
            ambient  0.2 0.2 0.5
            diffuse  0.1 0.1 0.3
            specular 0.3 0.3 0.6
            specpow 10
            reflect 0.4

        box blue -29   1 -1  -11 29 1    texture bump -8
        box blue  -9   1 -1    9 29 1    texture bump -2
        box blue  11   1 -1   29 29 1    texture bump  1
        box blue -29 -29 -1  -11 -1 1    texture bump  2
        box blue  -9 -29 -1    9 -1 1    texture bump  4
        box blue  11 -29 -1   29 -1 1    texture bump  8

Go to next section:
Checker.

Return to Contents.

THE END - Notes on Rayshade - 7 - Textures - Bump