Create faster wavelet type source
Please add a source that makes 3d cells, such as wavelet, without the complex (and time expensive) math. This does not need to be complex at all - it can be as simple as wavelet, but color by distance from the center, or corner. Maybe make numerous variables, some trivial to calculate, such as distance in the X axis.
This filter needs to create it's data correctly in parallel, as Wavelet currently does.