How to optimise VFX exlposion?

Unity Engine
1

I have a an explosion of sort and it looks great however, When I (the player) walk too close to the explosion and it fills up a lot of the screen the fps suffers a lot, dropping from around 140 to 17. I’m guessing this is due to having to fill up a larger portion of the screen but what sort of things should i be looking at to optimise this without effecting too much how it looks or it’s size?

I have a HDRP scene with volumetric fog/lighting. The VFX is set up currently t output a Lit Quad with a Translucent material type. This set up just looks right in the scene but I’m willing to compromise where I can for performance of-course.

Any advice would be super appreciated.

Thanks,

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2

Hi. There are many ways to optimize overdraw / per-pixel cost:

  • Use HDRP half resolution pass
  • Use Octagon primitive instead of quad
  • Use SimpleLit mode

More details in tutorial:

3

Thanks buddy that’s actually helped a lot. you gave me the right direction to go in and I did a bit more research and now its not dropping below 60 fps. I do think I can do better though.

Thanks again