Bug Path Tracing Denoiser GPU memory leak

I experience consistent crashes (in Unity 2023.1.0b13) after path-tracing about 6 sec of 60fps 1080p video with 300 samples accumulation. My GPU runs out of memory, and then it crashes when it runs out of shared memory as well. I can see that about 30mb GPU ram is eaten up for every frame rendered, disregarding the end format (image sequence, ProRes, ...). This effectively prevents me from working seriously with path-tracing.

I am depending on Dynamic Geometry and I think it could be related to this known memory leak:
https://issuetracker.unity3d.com/is...dering-dot-raytracingmode-dot-dynamicgeometry

The status says a fix is "In Review". Will it make it into the next update?

 

Nope. I've been through most of the low hanging fruits.

Thanks for letting me know. I very much looking forward to this.

 

I have just tested 2023.2a13 which includes a potential fix to the leak. Unfortunately my GPU memory is still filling up until eventually my machine crashes. I am not creating and destroying renderers at any points, so the I could have told myself it was unrelated.

Has anyone else attempted to render path-traced videos of GPU meshes (updated using GraphicsBuffer access with RayTracingMode set to Dynamic Geometry)? I am suspecting that garbage is created when Unity updates the RayTracingAccelerationStructure.

 

The leak has nothing to do with the above. It is caused by the denoiser(s).

This was apparently pointed out by Keijiro six months ago in this video (in Japanese).

So denoisers are useless when recording videos!
Unless you can stay below 5sec clips like Keijiro ended up doing.

Is there a fix underway?

 

This thread has more on the topic. The memory leak remains.

 

The leak is fixed in Denoiser 1.0.3.