Multi-Process Rendering
https://dev.epicgames.com/community/learning/courses/ev7/unreal-engine-multi-process-rendering
2 Likes
Hello, thank you for posting a good tutorial. I have a question. In ICVFXSample, the resolution of the OS cluster is set to the frame size of the ICVFXCamera, but I wonder if it is not necessary to do the same in the existing mGPU configuration.
For example, the frame size of the ICVFXCamera is 3840x2160, but does it matter if the OS screen is 1920x1080
And in Multi-Process Rendering: Converting an mGPU Config, I set Share Media input, Output in ICVFXCamera, but unlike the sample project, does OSCluster not have to set Media input?
Thank you.
Hello. The resolution of the OS screen is not relevant it has no viewport. Instead this resolution is set by the default resolution of the nDisplay config or as per the ICVFX camera resolution.
All of the settings of the media input and output are on the ICVFX camera. We have corrected this in the sample project in 5.3.
2 Likes
Thank you for your response Well understood! 
1 Like
I was wondering if someone here could kindly help?
I create videos for museums and they require high quality cinematics.
I currently have a 3090 and today I was talking to the team at Scan Computers and we tried to find a solution that would help increase my systems VRAM without having to buy a 48GB NVidia card, which is quite expensive.
Sadly my system doesn’t have room for another large 3090 card with a NVLink. I can however hold two of the newer 40 cards and as the 50s are just around the corner, he suggested I also wait to see what happens there.
Still I need to find a solution and I was hoping that two 4090s would speed up the render process while also doubling the systems VRAM to 48GB… however neither me or the computer wiz at Scan could tell if this would work with Multi-Process Rendering… as in would UE5.4 or UE5.5 access the full VRAM and then render at close to X2 the speed of a single card.
We also looked at the option to buy a PNY RTX 4000 which has an additional 20GB of VRAM… the gent at Scan thought this would work alongside my 3090 with UE5.4/5 Multi-Process Rendering… Could you kindly confirm that this setup would work and would it then increase my access to VRAM to a total of 44GB? or do I need two cards that are the same, example, two 4090s and if that was the case would those two 4090s allow UE5 to access their combined VRAM of 48GB?
I wish there was a video that made this process clearer as we have both been confused by what can and can’t be done.
Many thanks