6 PL shader calculates the direction of directionalLight in realtime and lerps/select what channel to display.
The shader gives me additional control over the emissive mask, baked lightdata intensity, smoke color or determine the color in niagara, playrate for flipbook, emissive color - since the emissive mask is in grayscale.
Simulation and 6 point light setup in houdini.
First Texture
R: Right light
G: Left light
B: Above light
A: Alpha
The alpha stored in A
Second Texture
R: Front light
G: Back light
B: Below light
A: Emissive