Vector output enablement; smallest wave changes

- With Pete Segal’s guidance, added vector outputs to the WIP channel
modifier. They don’t seem to fully work right now, but spray and foam
are contributing values. Displacement isn’t functional, for some reason.

- Due to modo’s UI zeroing out small values (necessary for detailed
small waves on large surface), the smallest wave value has become a
divisor. Internally we use it to divide ‘1’ and thus get the value we
need for HOT. Existing scenes will need to have the smallest wave value
changed accordingly.