undefined | Better HN

0 pointsteamonkey6mo ago0 comments

Shader recompilation causes stuttering not general performance problems. Shader complexity will though, which is a function of render quality.

But I’m confused about why you think fill rate isn’t an issue? If you are now upgrading from 1080p to 4K your GPU needs at the very least 4x the pixel pushing power and even then that’s only to maintain the same detail; you bought a 4K screen for more detail.

0 comments

flohofwoe6mo ago

> But I’m confused about why you think fill rate isn’t an issue?

Because this is can be easily dealt with via upscaling or buying a more expensive GPU, but fixing shader recompilation in the hot path requires a complete engine redesign.

teamonkeyOP6mo ago

There aren’t faster GPUs affordable to most consumers, that’s the point. Yes, DLSS is used as a crutch because it’s easier to do AI upscaling than render at a higher resolution.

You don’t need a full engine redesign. UE5 provides tools for PSO bundling and also pre-caching, but you need to use them.

Also good material design and structure helps reduce the number of PSOs needed but again, you need knowledge of how the engine’s materials system works.

If you are interested, this video explains some of the solutions. https://youtube.com/watch?v=i35yf-wh3Bs

everdrive6mo ago

> If you are now upgrading from 1080p to 4K

Presumably people do this because they hate money; as you say, it's much harder to make the pixels just slightly more crisp and you'll pay dearly for the privilege.

teamonkeyOP6mo ago

I think people do it because they want the best quality but they underestimate how much compute power is needed to drive it properly.

j / k navigate · click thread line to collapse

0 pointsteamonkey6mo ago0 comments

Shader recompilation causes stuttering not general performance problems. Shader complexity will though, which is a function of render quality.

0 comments

flohofwoe6mo ago

> But I’m confused about why you think fill rate isn’t an issue?

Because this is can be easily dealt with via upscaling or buying a more expensive GPU, but fixing shader recompilation in the hot path requires a complete engine redesign.

teamonkeyOP6mo ago

There aren’t faster GPUs affordable to most consumers, that’s the point. Yes, DLSS is used as a crutch because it’s easier to do AI upscaling than render at a higher resolution.

You don’t need a full engine redesign. UE5 provides tools for PSO bundling and also pre-caching, but you need to use them.

Also good material design and structure helps reduce the number of PSOs needed but again, you need knowledge of how the engine’s materials system works.

If you are interested, this video explains some of the solutions. https://youtube.com/watch?v=i35yf-wh3Bs

everdrive6mo ago

> If you are now upgrading from 1080p to 4K

Presumably people do this because they hate money; as you say, it's much harder to make the pixels just slightly more crisp and you'll pay dearly for the privilege.

teamonkeyOP6mo ago

I think people do it because they want the best quality but they underestimate how much compute power is needed to drive it properly.

j / k navigate · click thread line to collapse