Error at "Building OptiX acceleration structure" #72058

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Anže · 2019-11-30T01:31:39+01:00

Anže commented

2019-11-30 01:31:39 +01:00

System Information
Operating system: Windows-10-10.0.18362 64 Bits
Graphics card: GeForce RTX 2080 Ti/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 441.28
CPU: i9-9900k
RAM: 32 GB

Blender Version
Broken: version: 2.82 (sub 2), branch: master, commit date: 2019-11-28 22:02, hash: 77c7440540

Short description of error
When I try to render my scene using Optix it fails at "Building accelerated Optix structure" and gives me this error:

OptiX error OPTIX_ERROR_INVALID_VALUE in optixAccelBuild(context, NULL, &options, &build_input, 1, temp_mem.device_pointer, sizes.tempSizeInBytes, out_data.device_pointer, sizes.outputSizeInBytes, &out_handle, NULL, 0), line 876

It works just fine in the live viewport render view

Exact steps for others to reproduce the error
I can't really share the blend file since it's a unreleased project for some filmmakers. But in short it crashes during this part of the process:

Optix works fine in the deafult cube scene. The scene I'm rendering has 900k verts and at least 500k hairs. it includes hair dynamics and cloth physics.

**System Information** Operating system: Windows-10-10.0.18362 64 Bits Graphics card: GeForce RTX 2080 Ti/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 441.28 CPU: i9-9900k RAM: 32 GB **Blender Version** Broken: version: 2.82 (sub 2), branch: master, commit date: 2019-11-28 22:02, hash: `77c7440540` **Short description of error** When I try to render my scene using Optix it fails at "Building accelerated Optix structure" and gives me this error: OptiX error OPTIX_ERROR_INVALID_VALUE in optixAccelBuild(context, NULL, &options, &build_input, 1, temp_mem.device_pointer, sizes.tempSizeInBytes, out_data.device_pointer, sizes.outputSizeInBytes, &out_handle, NULL, 0), line 876 It works just fine in the live viewport render view **Exact steps for others to reproduce the error** I can't really share the blend file since it's a unreleased project for some filmmakers. But in short it crashes during this part of the process: ![2019-11-30 01_18_50-Blender Render.png](https://archive.blender.org/developer/F8179923/2019-11-30_01_18_50-Blender_Render.png) Optix works fine in the deafult cube scene. The scene I'm rendering has 900k verts and at least 500k hairs. it includes hair dynamics and cloth physics.

Anže commented

2019-11-30 01:31:39 +01:00

Added subscriber: @koko_ze

Anže commented

2019-11-30 12:41:48 +01:00

Ok so I have tried to render it without hair and it works fine. So I guess the hair is the problem.

edit: I tried rendering it with 2/3 of the hair and it worked.

edit2: Now that I have reduced the hair count by about 20% I can see that the peak memory usage is 9GB which is very close to the 11GB limit of my 2080ti.

So in conclusion I guess I ran out of memory.

edit3: does motion blur affect memory? Because I've had it turned on but felt that it was rendering too long so now I've switched to vector blur

Ok so I have tried to render it without hair and it works fine. So I guess the hair is the problem. edit: I tried rendering it with 2/3 of the hair and it worked. edit2: Now that I have reduced the hair count by about 20% I can see that the peak memory usage is 9GB which is very close to the 11GB limit of my 2080ti. So in conclusion I guess I ran out of memory. edit3: does motion blur affect memory? Because I've had it turned on but felt that it was rendering too long so now I've switched to vector blur

Germano Cavalcante commented

2019-12-02 19:59:07 +01:00

Added subscribers: @pmoursnv, @mano-wii

Patrick Mours was assigned by Germano Cavalcante

2019-12-02 19:59:07 +01:00

Germano Cavalcante commented

2019-12-02 19:59:07 +01:00

@pmoursnv, mind taking a look?

Patrick Mours commented

2019-12-03 14:01:32 +01:00

Sounds like an out of memory, which would cause Cycles to hand a null pointer to optixAccelBuild and fail with that error. But the only way to be sure is to compile Blender with "WITH_CYCLES_LOGGING" enabled to get the full error explanation from OptiX. There is not much I can deduce from just the error code without a reproducer scene.

Germano Cavalcante commented

2019-12-03 14:57:40 +01:00

Changed status from 'Open' to: 'Archived'

Germano Cavalcante closed this issue

2019-12-03 14:57:40 +01:00

Germano Cavalcante commented

2019-12-03 14:57:40 +01:00

In this case, I'm closing the report because not enough information was provided to reproduce the issue.
It can be reopened if more information is provided.

In this case, I'm closing the report because not enough information was provided to reproduce the issue. It can be reopened if more information is provided.

Tanveer Singh commented

2021-05-21 11:50:13 +02:00

Added subscriber: @LarryGill

Tanveer Singh commented

2021-05-21 11:50:13 +02:00

Yep reducing some hair works thx for helping. it worked for me on 2.9 RTX 2060.

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Error at "Building OptiX acceleration structure" #72058