bands (shader module)

sbl_bands(light, bands, soft, lift): steps an amount of light into a few bands with soft edges, keeping lift of the light in the darkest band and none where no light arrives. The Stepped light block uses it over the whole frame and the bandedToon shader uses it inside a material, so a chosen set of objects can be banded in their own material and the rest of the frame by the block. Include it with #include "~starterBlocks.blocks.lightBands.bands".