How to make this cool light effect

[RyanZhu]

 

[Mylenium]

Just a bunch of gradients combined. Two radial gradients for the corners to simulate the light bleeding into the surroundings, a simple linear gradient in the middle.

Mylenium

[Monika Gause · Accepted solution]

Like this perhaps: https://shared-assets.adobe.com/link/4da97ca1-27f0-4ff4-43c2-1eee3c537052