next up previous contents
Next: 6.21.6 Turbulence Up: 6.21 Procedural Texture Generation Previous: 6.21.4 Spectral Synthesis   Contents

6.21.5 Other Noise Functions

Gradient noise can be created using the same method described above, but with a different filter. The technique described above can also create noise that is not aligned on a lattice. To create sparse convolution noise [61] or spot noise [100], instead of drawing the entire point-sampled texture at once, draw one texel and one copy of the filter at a time for each random location.