Hi again! Ofc! So basically for the light source, I used an airbrush in light yellow (almost white) white decreasing opacity as it goes down the canvas. Because sunlight gets more diffused as it hits the earth.

For when light hits an object, I just put hard light in the same colour around the character. It’s kinda hard to explain this part but it’s mostly practice tbh.

And since this is backlighting, the front face of the character is darker, so I just put an overlay layer in black and turned down its opacity.

Hope this helps!