Boost Rendering Performance VR

Unity Engine
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1

Hello,

currently I’m having quite a problem with the FPS performance in my VR-App.
According to the Profiler it’s all about the Rendering (Render.OpaqueGeometry)

In this app I create a pointcloud of about 17.000 points.
At the moment I instantiate a primitive black sphere for each point.
I have neither light nor other expensive things, just a white solid background and many black sphere-gameobjects.
The more spheres are in my FOV the less fps i have, which is kind of logical but FPS drops under 15 very fast.

So my question is: Is there way to increase the performance maybe by attaching a simpler shader/material than the standard/built-in one or is the amount of gameobjects simply too much for the rendering pipeline to provide good FPS?

2

Your issue is draw calls/overhead, not so much the actual rendering. A few solutions exist:

  • Enabled instancing on the material
  • Simply attach all spheres into a single or a few objects
1 Like
3

Thanks for the advise,

enabling GPU instancing for the Gameobject’s material doesn’t seem to do the trick.

What do you mean with ataching all spheres to a single exactly?
Do you mean attaching them to a parent object or something like Mesh.CombineMeshes?

EDIT:
Found a thing that helps quite good

The wrong way was to create a sphere for each point with Gameobject.CreatePrimitive() and then I edit the components in the code.
Now I creat a Prefab of a Sphere with just a Mesh and a Mesh Renderer and instantiate this Prefab for each point.

UnityEngine.Object o = Resources.Load("Prefab");
        GameObject go = GameObject.Instantiate(o) as GameObject;

Now the Spheres are kind of clones from each other and not single instances anymore.

Another thing that helped was to combine the meshes from each sphere.