How can I achieve something like the picture?

Questions
1

Hello! I was wondering how can I achieve something just like the picture without baking texture in Blender or ray/path tracing.

WX20220209-023955@2x
WX20220209-023955@2x1368×1150 85.6 KB

Just like the picture, one mesh is effected by other mesh’s color. It’s something like local Ambient light. Can I make this by Three.js?

2

you can’t. you must bake. as you said yourself, this needs to be raytraced and that’s going to be very expensive. it is only feasible for still shots LGL Raytracer - CodeSandbox

you might get away with some AO Ballpit - CodeSandbox but these are one trick pony smoke and mirror effects, and still on the expensive side. i think @gkjohnson once experimented with a GTAO (ground truth) variant, it looked amazing, but it wasn’t fast enough when i tried.