OTOY Forums

Hey guys,

I have an exterior archviz project where I need to use render layers. I have rendered the whole image with 2000 samples in the PT kernel in a about 3 hours.
I let the the render layer render over night with just a few chairs and and plants enabled, other settings kept the same, but after 10(!) hours of rendering it still only had 400 samples done.

I use the v3.1 alpha with the c4d plugin. Is this a known error of the alpha or somethign different?
I would like to avoid uploading the scene because it is very large, but if needed I can do it.


Cheers

Hi RahiSan,
let me do some tests, I will back to you asap
ciao beppe

Thank you Beppe, quick to reply as always

Propably it's not about renderlayer, etc.. Just due out of vram.

Hi RahiSan,
I have made some test with a scene that almost full off my 3GB VRAM, and leaving only 85 MB free, I was obviously not able to render in Picture Viewer with passes. The solution, in my case, was to lower the Parallel Samples in order to have more room in VRAM for the final output, you could give it a try
ciao beppe

Thank you both for your replies!

Do I understand correctly that rendering a render layer takes more Vram and is harder work for the cards than just rendering the whole scene?

What is the reason for this? To me this does not seem logical. Shouldn't it take the same amount of vram or less and render faster?

As I said, the whole scene renders nicely with all the passes and plenty of vram left, it is just the render layer that renders very slowly.

Maybe I am using this wrong?

I rendered the whole scene with all the passes trough the picture viewer as usual. The render done and saved I

then I grouped all the objects that I want to render as a layer, put an octane object tag on the group and set the render layer to 8.

Then in the Renderpasses settings of octane I enabled Render layer and set the ID to 8. It renders as expected, just very slowly.

Am I missing something?

Cheers!

You still missed the point. This is not a plugin issue, highly related with renderer. So we can't give exact answers to you.
What's amount of free vram when render process? Please can you export your scene to orbx? Can you create a topic in standalone forum with attached orbx file and these questions or just please drop a link for your scene in this topic?
Don forget to write down your hardware details and free/max/usable vram/ram amounts.

Hi RahiSan,
No, VRAM does not augment with Render Layer active, sorry for the confusion about my previous post. What I wanted to say was that if the VRAM is almost finished, its possible that the render fails because some few MB are needed for the final resolution but there is not enough.
I have made several tests with different scene types and complexity but I was not able to observe a drastically reduction in Mas/sampling as you describe The reduction in general is about 10% in my tests
Probably there is something very particular in your scene. As Ahmet said, if you are able to create an orbx file that shows the effect, it could be very useful if you share it with the devs team
ciao beppe

Thank you for your replies!

Today I tried to export an OBRX and render it in the standalone but it would not fit the Vram. I guess maybe due to the instances from Cinema being converted to geometry?
I will do some more testing and see if I can create a working ORBX that shows the effect.