TIP

The Iris Project•6mo ago•

4 replies

superminerJG (altn't)

Frames tank when adding a gbuffers_skybasic shader

So I'm working on a shader pack, and for whatever reason, adding

gbuffers_skybasic

gbuffers_skybasic

in any form seems to cut my framerate to about 1/3 of what it does without. I have no clue why this is, and suspect it's either my GPU's problem or Iris's problem.

the shaderpack in question: https://github.com/jgcodes2020/steve-shaders/tree/a339f36db0c8777bf51ede58b20ee2ec670c839d (please use this commit)
Try removing gbuffers_skybasic and see if it somehow boosts frames instantly.

GitHub

GitHub - jgcodes2020/steve-shaders at a339f36db0c8777bf51ede58b20ee...

Somewhat Trivially Enhanced Visual Effects - a simple shaderpack for simple effects - GitHub - jgcodes2020/steve-shaders at a339f36db0c8777bf51ede58b20ee2ec670c839d

Solution

I figured out what's causing it:
- writing to colortex1 in gbuffers_skybasic slows things down by a lot
- using hardware clear to set the buffer's colour appears to be significantly faster
- the specular information buffer is an RGBA32UI texture, so that could explain the slowdown since it would get overridden on every pixel that actually has geometry

Jump to solution