Question Really poor performance with latest Hybrid Renderer v2 and URP

Rendering just 3000 primitive spheres with a custom URP shader with hybrid instancing enabled takes 11ms for the rendering system to execute. My setup involves an authoring component on a gameobject in a subscene where the component has a public entity field which is assigned a prefab of my sphere before entering playmode. This means that my entities have all the special components needed to support URP.

There's nothing else in my subscene and I've enabled hybrid renderer V2 in the scripting defines.

In a non dots project I can render 15,000 spheres with regular GPU instancing at 60fps so for me, DOTS is 5 times slower at rendering.

Any ideas?

 

Reminds me of this post a while ago.

 

That doesn't apply here since this is a pure DOTS project. Like the title says, I'm using the hybrid renderer already. And I've enabled v2 which is supposed to have even better performance and feature support.

I've made an equivalent set up back when hybrid renderer 0.4.0 was new and I was easily able to render a few hundred thousand entities. Now I can barely render 5000.

 

Are your entities static or do they have to recalculate localtoworld every frame? (also what version of URP/unity?)

 

My entities are non static though with only 3000 of them I'd be shocked to hear that non static rendering is that poor with hybrid v2.

My editor version is 2020.1.0 and my URP version is 9.0.0-preview.14. I'm aware that there's a preview 35 available but the shader graph window got a huge update in that version which was missing the option to mark shader fields as hybrid instanced so I downgraded back to preview 14 which matched the hybrid renderer documentation.

 

HR v2 performs well for the rendering itself, keeping stuff persistent on the gpu. But it has some serious performance issues in other areas. Static stuff it can still do well as long as you aren't using too many LOD levels. Moving renderers I would use another api like DrawMeshInstanced for now.

 

It's what I am doing for certain repeated mesh renderers. Then again my project has been going for years now, slowly integrating DOTS-functionality...

 

if you can, try with Hybrid v1 and built-in pipeline, and see if that's better. There are tons of performance issues right now with URP: https://forum.unity.com/threads/per...ions-of-unity-post-processing-and-srp.786944/

 

How's your HRV2 performance running nowadays? is it getting better with latest Hybrid render..?