There’s stuff I have to separate with layers, that’s why, how can I make an effect affect multiple layers?
I think you’ll need the effect on each layer. And that can slow down the game, so consider if it’s really needed, or if you can achieve the same results with a different approach.
Do some of the layers have multiple effects?
But I think, with the current effects available, tilt shifting is a bit of a stretch. You’re looking at two lots of 1/3 screen blurring, and hue/saturation adjustments. GDevelop just doesn’t have the grunt to achieve that on a lot of devices.
Ideally what GDevelop needs here is a post processing shader/effect, and apply it once after the scene frame has been generated.