ParaView 6.0.1. crashes when using Optix pathtracing

Captain_Convergence · October 18, 2025, 5:48pm

Dear support,

I am working on my linux laptop where I have a NVIDIA Quadro RTX 4000 Mobile GPU with the driver nvidia-driver-555. I have downloaded ParaView 6.0.1. and I run it without compiling it (as I have always been doing). However when I activate the Optix pathtracing, ParaView shuts down and shows this error:

VisRTX 0.1.6, 0: Quadro RTX ( 32.441s) [paraview ( 32.443s) [paraview ( 32.543s) [paraview ( 32.543s) [paraview ( 37.782s) [paraview ( 37.782s) [paraview ( 43.500s) [paraview ( 43.581s) [paraview ( 43.581s) [paraview ( 45.172s) [paraview ( 45.172s) [paraview ( 46.592s) [paraview ( 46.592s) [paraview ( 50.781s) [paraview ( 50.781s) [paraview ( 52.750s) [paraview ( 52.750s) [paraview terminate called what(): Already error: exception using devices: 4000 with Max-Q Design (Total: 8.2 GB, Available: 8.0 GB) ] FrameBuffer.h:79 ERR| VISRTX Error: Could not get color texture. ] FrameBuffer.h:92 ERR| VISRTX Error: Could not get depth texture. ] FrameBuffer.h:79 ERR| VISRTX Error: Could not get color texture. ] FrameBuffer.h:92 ERR| VISRTX Error: Could not get depth texture. ] FrameBuffer.h:79 ERR| VISRTX Error: Could not get color texture. ] FrameBuffer.h:92 ERR| VISRTX Error: Could not get depth texture. ] vtkPVRenderView.cxx:3710 WARN| vtkPVRenderView (0x207f6b70): You must enable streaming in Edit->Settings/Preferences for iterative refinement. ] FrameBuffer.h:79 ERR| VISRTX Error: Could not get color texture. ] FrameBuffer.h:92 ERR| VISRTX Error: Could not get depth texture. ] FrameBuffer.h:79 ERR| VISRTX Error: Could not get color texture. ] FrameBuffer.h:92 ERR| VISRTX Error: Could not get depth texture. ] FrameBuffer.h:79 ERR| VISRTX Error: Could not get color texture. ] FrameBuffer.h:92 ERR| VISRTX Error: Could not get depth texture. ] FrameBuffer.h:79 ERR| VISRTX Error: Could not get color texture. ] FrameBuffer.h:92 ERR| VISRTX Error: Could not get depth texture. ] FrameBuffer.h:79 ERR| VISRTX Error: Could not get color texture. ] FrameBuffer.h:92 ERR| VISRTX Error: Could not get depth texture. after throwing an instance of ‘optix::Exception’ mapped (Details: Function “RTresult bufferMap(RTbuffer, unsigned int, unsigned int, void*, void**)” caught exception: Buffer is already mapped) occurred: Subprocess aborted

Would it be possible to have any guidance on this subject? Than you in advance for your time!

mwestphal · October 20, 2025, 7:31am

Just tested with my NVIDIA GeForce RTX 2080 on Linux, it works great.

Captain_Convergence · October 20, 2025, 4:41pm

With the OSPray pathtracer it works fine, here I have an sphere with 1 sample per pixel

And here 5 samples per pixel

However with the Optix pathtracer, it works fine with 1-2 samples per pixel but if I increase it beyond 3 samples to increase the quality, it crashes with the error mentioned above.

Are there any extra controls that could be useful to improve the rendering quality without adding samples per pixel?

mwestphal · October 21, 2025, 8:09am

Unable to reproduce, works fine here (40 samples, denoise, material, env lighting):

Captain_Convergence · October 21, 2025, 6:48pm

Would it be possible to record a .py so I can have the same exact set up? I am very puzzled that it doesn’t work the same way if the only modifications were samples, denoise, material and env lighting

mwestphal · October 22, 2025, 9:10am

Here it is:
optix.py (4.1 KB)

TBH you may also want to clean your settings.

Captain_Convergence · October 22, 2025, 4:51pm

Now it works! Thanks a lot

I wasn’t using the following settings:

paraview.compatibility.major = 6
paraview.compatibility.minor = 0
renderView1.CameraFocalDisk = 1

However I am quite surprised that these have a major effect on the graphics when using OptiX… I’ll keep looking into this since I am brand new to reallistic renderings

Thanks a lot for the support and any guide/tutorials/information on the topic would be very appreciated!

mwestphal · October 23, 2025, 7:30am

This should not have any impact, can you share a script to reproduce your issue ?

Captain_Convergence · October 25, 2025, 3:19pm

Well false alarm, works in my workstation with windows where I have a GPU without ray tracing but it crashes when using my linux laptop with my RTX GPT. I leave here a reproducer which crashes for me if i set renderView1.SamplesPerPixel = 40

reproducer.py (12.5 KB)

mwestphal · October 27, 2025, 7:55am

What is that ?

Captain_Convergence · October 27, 2025, 8:43am

RTX GPU, I meant GPU with hardware accelerated ray tracing, sorry

mwestphal · October 27, 2025, 8:49am

Please share exact model and driver version as well as OS version.