vRam overload (don’t know why)

thedeltademon

may someone can help me: I’ve got vram problems wit an 2080ti. 3 gen8 models with hair and clothing, background, HDRi, some object consuming with an 512/768 threashold mor the 11gb vram. That’s not normal. For some weeks I render a scene with mirrors and 6xGen8 charas that’s uses around 10gb vram. What can be the problem? I reinstalled Daz3D, uses scene optimizer. All without the problem. I render the same scene yesterday with a different poses and there wasn’t so big problems. I only render 1 character of the scene nude, around 8gb vram. That's too much. 

Dim Reaper

Is it possible that the Render SubD Level of these 3 models is set higher than on your previous renders?

Select the model > Parameters > Mesh Resolution > Render SubD Level 

If it is set to 3 or 4 then that may be what is using up your VRAM.

mclaugh

DS doesn't completely clear vRAM between iRay renders, so each successive render during a session reduces the pool of vRAM available for the next render. If you render several complex scenes in succession without manually clearing vRAM (quit and restart DS*) there may not be enough free vRAM available to hold the next render.

* In 4.11 and earlier, you could manually clear vRAM by switching between GPU-only and GPU+CPU rendering. Have not installed 4.12 general release or beta, so don't know if it still works in 4.12.

fastbike1

@thedeltademon "I only render 1 character of the scene nude, around 8gb vram"

You must have SubD set high or other things going on. A naked G8F is 1.3 GB on my 980TI. Studio 4.12.0.86 and/or Public Build 4.12.1.40

@mclaugh "manually clearing vRAM (quit and restart DS*)"

My installation will return Vram to essentially the start point if I close all render windows. It won't be immediate , but it happens in less time than it takes to quit / restart Studio. 

mclaugh

fastbike1 said:

@mclaugh "manually clearing vRAM (quit and restart DS*)"

My installation will return Vram to essentially the start point if I close all render windows. It won't be immediate , but it happens in less time than it takes to quit / restart Studio. 

Bully for you.

Last time I ran a render I closed the render window—I never open multiple render windows—and cleared the scene when it finished and GPUZ still showed 741Mb vRAM in use. That's with an empty scene, and texture shaded window, so they aren't the culprits. 24+ hours later, GPUZ still showed vRAM usage at 741 Mb. Quit DS, vRAM usage dropped to 27Mb. Fired up DS, and no change in vRAM usage.

I've done this several times on both my current (GTX 1060) and previous (GTX 980M) laptops, going back to 4.10, and the result has always been the same.