Is the a guide for performance tuning with Hybrid Renderer?

Are there any guides or documentation for tuning performance with the Hybrid Renderer? I've been searching around the documentation and forum and I can't find any.

For example, the standard Unity documentation includes the "Optimizing graphics performance" guide (https://docs.unity3d.com/2020.2/Documentation/Manual/OptimizingGraphicsPerformance.html). Obviously some of the tips in that are generally applicable (like keeping vertex count as low as possible, minimizing materials per scene, etc.), but I'm wondering how Hybrid Renderer changes things. I'm starting to bump up against my budget on my render thread, but I'm not really sure what potential optimizations there are or what potential bottlenecks I should be looking for that are specific to using the Hybrid Renderer.

 

Count me in, I take it for granted that it would be more performent than non-hybrid render, but it's getting even less performent and much need is a little hybrid render optimizing guidance and which puddles to be aware of to avoid.

 

Cool! now we are in DOTS graphics zone.

I think the most and first wanted approach is: How many steps do we have to go through when turning a Builtin/URP/HDRP scene into a Hybrid scene, here is mine somehow(perhaps most guys are doing so):

1. Simply put a scene under Subscene or ConvertToEntity, and result is not quite ideal (lose 60%FPS)
2. Take some research in HybridURPSamples, noticed that `Static``LOD``OcclusionCulling` might pull the trigger
3. Convert old ones to `StaticOptimizeEntity``HLOD``SceneSectionComponent``OccluderComponent``OccludeeComponent`
4. Run again and FPS drops to almost ZERO(then I found the possible cause is `OccluderComponent` and that's anthoer thread I opened)
5, Run without `Occluder` and FPS still not improved, and here I am now(been 5 days since).

Certainly HRV2 is no regressions, without a doubt, is just me couldn't get it out of malfunction.

And there're some interesting read from some forum thread about performance in hybrid render:

"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."
--snacktime

"Many vertices itself not a problem, but many different meshes can be not so noticeable performant in comparison for now (I expect it to be on the same level as unity default renderer with Built-in and SRP pipelines)"
--eizenhorn

Plus with a few tests of mine, heavy mesh is considerably low performamce than mesh like `Cube``Capsule`, probably.

I've been noticing Viking Village URP is released recently, say if you want it be hybrid, what will you do to get it done step by step?

 

Yes, these will help me spot several potential opts.

Yes, I will try it.
Thank you for these useful info.

Hybrid render is the last piece of DOTS for my proj, so far it runs pretty awesome with other DOTS parts(like with DOTS Anim), and "performance by default" sounds good always.

 

It's been a while since struggle with `Converting a URP scene into a Hybrid scene` progress, the FPS is reclaimed 80% more or less in last improvement, considering I'm not using any Hybrid OC, FPS's going to be better when it's ready to perform.

Btw, it turns out `StaticOptimizeEntity` pull the trigger and restore my FPS from 39~45 to 80~85,

Btw again, the original URP scene renders at 108~111 FPS.(500X500 terrain and 15k+ props)





I have to say profiler is not my thing and really would like it makes sense to me, are these profiler cuts correct?(1 is URP scene and 2 is Hybrid scene)

Not much further to add at the present stage, if there's potential todo, let me know, hope all our scenes can be rendered as performent and splendid as what Megacity does~

 

Yes, you gave me the perfect direction of it. I checked all hybrid components and found these `companion` related tags:



And they are automatically created and attached to entity that with specific hybrid components when subscene import is completed, below are the types of what I learned:
1. URP Post-processing Volume
2. Light
3. TextMesh
4. Terrain
5. ParticleSystem
6. LightProbeGroup
7. ReflectionProbe

After these fellows are dragged out of subscene and stay as game objects, the FPS rise from 80~85 to 95~98, and no more `companion...state` tags.

But here comes another question, are these components supposed to have `companion...state` tags? I mean they are all static and don't need to change transform all the time. Or is it a way to have them converted without those tags attached?

There're total 2 scripts in proj, one is a converter which

Code (CSharp):

1. var terrain = gameObject.GetComponent<Terrain>();
2. conversionSystem.AddHybridComponent(terrain);

, one is a SystemBase and do have query for hybrid component `Terrain`

Code (CSharp):

1. query = GetEntityQuery(ComponentType.ReadOnly<Terrain>());

, but both 2 scripts are running for once, and it doesn't make any difference when removed from porj.

 

----------------------A year after----------------------

OK, back to work of optimizing with hybrid renderer(v0.11), plus Entities(0.17) and Unity(2020.3.36).

Fixed this companion updating overhead issue.

Turns out the transform sync work in "CompanionGameObjectUpdateTransformSystem.cs" is setting all companions constantly without further identifying.

It is appropriate for dynamic companion objects like followed `Camera` or moving `VFX`.

But not for static companion objects like `Terrain` `Probe` `Volume`.. those I mentioned in previous post.

So what I did is separating static companions into updating only once(by adding custom `IComponentData` as a tag), and keep dynamic companions running as always.

Then all undergoing companions in the scene drops from 100+ to 2(one 3rd person camera and one 1st person camera), and `CompanionGameObjectUpdateTransformSystem` is performing from 0.54ms to 0.04ms.


More references to solve this:

https://forum.unity.com/threads/com...ry-slow-on-large-scenes.1016305/#post-6784961

https://forum.unity.com/threads/com...ry-slow-on-large-scenes.1016305/#post-7397246