Denoiser crashing on big renders Tweet

[jerzer]

I tried a few large 8000 x 8000 pixels renders with denoiser activated and it crashed both standalone and C4D.

I tried with ORC and render failed as well, so it's not my computer.

Anyone else experiencing this?

[grimm]

Hi, This takes a huge amount of memory. I have a 32GBytes of memory and it took all of it and about 3 GBytes of swap to do the render and denoise, but it worked. This is for a very simple scene too, so if you don't have at least that amount of memory your going to run out of memory and your system might crash. When it started the denoise it took another 1 to 2 GBytes of memory, so about 27 Gbytes of memory total if I subtract what I was using before I started the render.

[Phantom107]

Very interesting topic, my plan to tackle this is to build rigs with 3x GTX 1080 Ti and then 1x GTX 980 Ti I now have leftover...., the GTX 980 Ti used just for denoise. It's 6 GB VRAM is too small to render with but I hope will be spatious enough for denoise.

[grimm]

This wasn't vram, it was system ram that I ran out of. The vram used on the 2070 was very little, about 2Gbytes. Although I didn't keep track of it very closely, I was more worried about the system ram usage at that point.

[jerzer]

In my case I have 64gb Ram. Looking at task manager, Octane is taking around 30gb for rendering the crashing scene, so I still have around 30gb available. If memory is the issue, damn, that denoiser is a hungry beast.

I wonder how much memory does ORC nodes have, as these are failing as well.

[grimm]

Yeah, that doesn't sound like a memory issue, must be something else. Are you using a plugin or standalone? If you are using a plugin, have you tried to just use standalone and see if it crashes too?

[jerzer]

Standalone fails as well.

[grimm]

I was rendering with standalone with my test and it worked fine, memory issues aside. It's probably something wrong with your video drivers, etc. But this is beyond my understanding of Windows, sorry not much help.