How to optimize drawcall for 2d renderer

Now each 2d light generates a new drawcall. This is a huge performance waste.

Wondering what optimizations can be used on a 2d renderer.

SRP Batcher？GPU instancing？Dynamic batcher？

Do they work on 2d lights?

 

@rustum couldn't lights with compatible parameters be batched? For instance, I have 50 sprite lights on screen with only color and matrix differences.

 

Here's an example: some terrain that's lit with quite a few lights that fade in/out over time.

Spoiler

In the Frame Debugger, this produces a light texture like so (left) but many DrawMesh calls that are nearly identical (right).

Spoiler

If these were normal sprites, not sprite lights, they would be batched. I know the 2D Renderer does all kinds of fancy stuff to batch light layers, but within a layer there's still individual DrawMesh calls.

 

@rustum Any news on this?

2D lights (no shadows) are not batching together when making a simple "ring" of the same 2D light. All lights are on the same layer too (URP 12.1.4):

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