neonZorglub wrote:coilbook wrote:Hello,
We are still having an issue with the denoiser. Why rendering overall gets slower by a factor of 2 even though we chose denoise on completion. So rendering itself should have the same speed whether denoiser is on or off Thank you
Hi coilbook,
As far as I know, the denoiser is a separate process that runs in parallel to the rendering, taking input images while they are generated.
I guess that there is still some part of the denoising that is done while the render progress, even if denoise on completion is selected..
I will test with 3dsMax and with Stand Alone, to make sure the Max version don't add un-necessary steps..
Thanks
Hi coilbook,
I tested a medium size scene, and got a render time with denoiser around 5 % longer than without denoiser.
I think the denoising do not take excessively more time, but it might take quite some memory. If you reach some memory limit, the system will have to move things around, and that might take some time..
I'm not sure if it's more a graphic card's VRAM or system RAM limit, you could try with different values of the Out of core memory settings..
To get more detail, you can go in Octane Preferences, Trouble shooting, and enable "Enable Extra Log', and 'Enable render performance report'
Render 1 frame, and wait for the render to finish, then edit the log file (Tools / Edit Octane Plugin Log file)
There are memory information before and after the render, and between, a 'Performance report'
In my case, it looks like that:
********************************************************************
* Performance report (Wasserwerk_PerfTest01.max, Normal Render) [frame 0], total time : 184.47 sec
* Primitives: 9426965, Meshes: 719, Voxels: 0
..
---- Memory usage (Post frame render) ----
25 percent of memory in use.
33.16 GB used / 127.75 GB total of physical memory
54.58 GB used / 146.75 GB total of paging file
159.05 GB used / 131072.00 GB total of virtual memory
..
Out Of Core memory: Enabled = 1, used=53.41 MB, maxi=10.80 GB, used.b.oct=8.81 GB, tot.used=33.16 GB, totRam=127.75 GB
gpuHeadroomBytes=100.00 MB
Note the 'total time :',and the 'used.b.oct' (that's the system RAM used by Octane)
Do the same with and without denoiser, and see if it looks like approaching some limits ('totRam' / total of physical memory)
To have a look at the VRAM usage, it's better to open the Octane Viewport, and, while rendering, open the 'Octane Device Settings in Render setup / Devices..
I checked the same sample, exported as orbx, and rendered with Stand Alone, and got similar results (about 10 % slower with denoiser)
I hope that helps
Thanks