V-Ray GPU Not releasing memory in RTX mode when using Progressive sampling

V-Ray V-Ray GPU Issues
1

Hi there,
I am trying to render the same scene using multiple cameras (multiple view angles, etc.) via 3dsmaxbatch.exe WITHOUT 3ds max restart (I cannot afford that).

I am using pymxs for that and I’m getting OOM errors as my RAM is being eaten alive!


outp_file = os.path.join(frames_dir, "render.png")
    bitmap = rt.render(
        frameRange=rt.Interval(start_frame, end_frame),
        outputFile=outp_file,
        # progressbar=False,
        vfb=False
    )​

How can I free used memory before each render?

This is what I already tried (DOES NOT WORK):


    # try GC twice in case either python or maxscript version works, DOES NOT WORK
    rt.execute('gc()')
    rt.gc()
    # saw these in docs, DOES NOT WORK
    rt.execute('freescenebitmaps()')
    rt.execute('clearUndoBuffer()')

    # figured it might help to release "occupied memory" as owner i.e. the plugin will be reloaded hence resource released? DOES NOT WORK
    rt.execute('LoadDllsFromDir ((getDir #maxroot) +"applicationplugins\\vray3dsmax2025\\plugins") "*.dll"')

    # HACK: Set different renderer to free memory, really stupid but in case it works? DOES NOT WORK
    all_renderers = rt.rendererClass.classes
    vray_gpu_renderer_class = [renderer for renderer in all_renderers if "V_Ray_GPU" not in str(renderer)][0]
    renderer = vray_gpu_renderer_class()
    rt.renderers.current = renderer
    rt.execute('freescenebitmaps()')​

How can I fix RAM issue please?

P.S. I am using recommended GPU drivers (The current Recommended Windows Driver is a 566.14 Studio driver for GeForce cards​)

Petr

2

It’s an issue with NVidia. Try reverting to the 552.44 driver as Muhammed suggested here. Make sure you restart your PC before testing.

3

What is the timeline to resolve the issue on your side? @hermit.crab

4

We’ve reported the memory leak to NVidia. Hopefully, they will be able to resolve it in future driver updates.

5

Any updates?

6

You already found the answer here.