Motion Track Lighting

[JohnGrafe]

A logic question only; if there is a shadow catcher, how about a light catcher?
for example, I track a street and place a point light in a wall or road and I want to light the scene where the point light is

I tried to browse and search this many times and didn’t see any YouTube tutorials or communities talking about it

[carterbk]

Since its update in 3.0, the shadow catcher has been able to catch both shadows and light.

New Shadow Catcher Features in Blender 3.0 | Cycles X Tutorial

It partially comes down to how you expect a “light catcher” to work, though: do you want it to brighten the underlying layer, as in that video; or additively layer on top, as in a render on black you composite with Add or Screen; or give you a mask you can use to color-correct the base image yourself? See here for an extended discussion:

Light and Shadow catcher at the same time. How?

Right, and that’s what the technique I just described is for—capturing the effect of the light on the object, but not the object itself, and allowing it to be transferred to any other image in compositing. Should I have used an image instead of a blue solid to demonstrate in my example? That first picture is the viewport, the second is what the Shadow Catcher pass looks like, and the third is the composite, with the pass multiplying brightness onto the solid blue background. What, in your mind,…