OctaneRender® 2026.2 for 3ds max® v26.5

[neonZorglub]

Here's the scene

Hi Elvissuperstar007,
Thank you for the scene.
I tried repeating viewport rendering, closing viewport, changing some parameters, re-opening viewport, many times, but could not reproduce the crash..
What kind of editing do you usually do ? (eg material parameters ?, camera ? render settings parameters, ... ? )
I'll try to test more in a similar way as your workflow, and maybe make a script to keep those tests running for several hours..
Also, if you have several GPUs, could you try to work with only 1 for a day, and switch to another GPU on the next day ? (just in case that's a crash related to gpu / driver ..)
Thanks

[Elvissuperstar007]

Well, it didn't crash right away. I had to work with the real-time material settings, and it would work fine for 20-30 minutes and then close 3ds Max. This didn't happen with the Octane 2025 version.

[paride4331]

Hi coilbook,
It should be something like this, more or less, and then it can be adjusted as needed.
Regards
Paride

01ge.zip

(255.36 KiB) Downloaded 13 times

[ramone163]

Starting with the 2025 versions, there is a problem with VDB files. The parameters, viewport and timeline have started lagging. In version 2024, everything works smoothly.

[paride4331]

Starting with the 2025 versions, there is a problem with VDB files. The parameters, viewport and timeline have started lagging. In version 2024, everything works smoothly.

Hi ramone163,
I’ve run several tests with versions from v2024 onward, and it seems there’s an issue with reading and writing .vdb cache files in v2026. I’m submitting my report to the development team.
Regards
Paride

[coilbook]

Hi coilbook,
It should be something like this, more or less, and then it can be adjusted as needed.
Regards
Paride

00.jpg
01ge.zip

Thank you!

Anyway to get better vram usage. Parallels samples from 16 to 32 use like 2 gb of vram, AI light uses like 3-4 gb of vram. That's a lot of wasted vram. So half of 12 GB of precious vram gets used by octane for technical purposes only.

[ramone163]

Starting with the 2025 versions, there is a problem with VDB files. The parameters, viewport and timeline have started lagging. In version 2024, everything works smoothly.

Hi ramone163,
I’ve run several tests with versions from v2024 onward, and it seems there’s an issue with reading and writing .vdb cache files in v2026. I’m submitting my report to the development team.
Regards
Paride

Thank you

[Elvissuperstar007]

Try rendering for about 10 minutes while changing materials on the model in real time. All materials are present in the Material Editor.
Close the Octane Interactive viewport.
Hide the group of light sources and enable one light that is currently turned off.
Go to the 3ds Max Environment settings and change the light color from gray to pure white.
Try to start the interactive viewport again — 3ds Max will close without any error message.

This happens every time. At the same time, 3ds Max does not crash if I render while changing materials. However, as soon as I change the environment, disable the main light, or enable a previously disabled one, it crashes immediately — but only when launching the Octane interactive viewport. If I restart 3ds Max and adjust these parameters before rendering, everything works fine and it renders normally.

[paride4331]

Try rendering for about 10 minutes while changing materials on the model in real time. All materials are present in the Material Editor.
Close the Octane Interactive viewport.
Hide the group of light sources and enable one light that is currently turned off.
Go to the 3ds Max Environment settings and change the light color from gray to pure white.
Try to start the interactive viewport again — 3ds Max will close without any error message.

This happens every time. At the same time, 3ds Max does not crash if I render while changing materials. However, as soon as I change the environment, disable the main light, or enable a previously disabled one, it crashes immediately — but only when launching the Octane interactive viewport. If I restart 3ds Max and adjust these parameters before rendering, everything works fine and it renders normally.

Hi Elvissuperstar007,
I can’t reproduce the issue on my side. Maybe I’m missing something, or there’s a specific step I’m not taking. Could you clarify the exact sequence of actions?
Regards
Paride

test.mp4

(12.39 MiB) Downloaded 2 times

[paride4331]

Hi coilbook,
It should be something like this, more or less, and then it can be adjusted as needed.
Regards
Paride

00.jpg
01ge.zip

Thank you!

Anyway to get better vram usage. Parallels samples from 16 to 32 use like 2 gb of vram, AI light uses like 3-4 gb of vram. That's a lot of wasted vram. So half of 12 GB of precious vram gets used by octane for technical purposes only.

Hi coilbook,
Could you provide some information about the type and number of light sources in the scene?
Regards
Paride