This is not from the white dot. It’s the general “room light” (like sky light, bounced light, or a lit room). Higher ambient = fewer deep shadows.

Also not from the white dot directly. This simulates light bouncing off the ground/walls back into the shadow side.

This is about the white dot: small light = sharper shadows, big light = softer shadows. (Think “bare bulb” vs “big window”.)

Use this when the background is dark and you want the bounce to read clearly.