OpenVDB import volume voxel offset #119082

New Issue

Alexey-Garifov · 2024-03-05T11:36:54+01:00

Alexey-Garifov commented

2024-03-05 11:36:54 +01:00

System Information
Operating system: Windows-10-10.0.19044-SP0 64 Bits
Graphics card: NVIDIA GeForce RTX 3060/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 531.14

Blender Version
Broken: version: 3.0.0, branch: master, commit date: 2021-12-02 18:35, hash: rBf1cca3055776
Worked: (newest version of Blender that worked as expected)

Short description of error
Imported OpenVDB from SideFX Houdini is transformed/scaled by voxel length.. VDB sample is attached. VDB was produced in Houdini, its size is exactly 1x1x1m. Resolution 32x32x32.

Exact steps for others to reproduce the error
Shift+A -> Volume -> Import OpenVDB
Look to it from Ortho cam with orthographic scale = 1.000 with resolution 256x256.
Volume should match camera area exactly (and it matches in Houdini), but in Blender it's not.

**System Information** Operating system: Windows-10-10.0.19044-SP0 64 Bits Graphics card: NVIDIA GeForce RTX 3060/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 531.14 **Blender Version** Broken: version: 3.0.0, branch: master, commit date: 2021-12-02 18:35, hash: `rBf1cca3055776` Worked: (newest version of Blender that worked as expected) **Short description of error** Imported OpenVDB from SideFX Houdini is transformed/scaled by voxel length.![image](/attachments/1ac41d99-d8e2-4fa3-a6f6-9c734172323e). VDB sample is attached. VDB was produced in Houdini, its size is exactly 1x1x1m. Resolution 32x32x32. **Exact steps for others to reproduce the error** Shift+A -> Volume -> Import OpenVDB Look to it from Ortho cam with orthographic scale = 1.000 with resolution 256x256. Volume should match camera area exactly (and it matches in Houdini), but in Blender it's not.

volume_sample.0005.vdb

131 KiB

image.png

414 KiB

Alexey-Garifov added the

labels 2024-03-05 11:36:54 +01:00

Alexey-Garifov changed title from ~~OpenVDB offset~~ to OpenVDB import broken

2024-03-05 11:37:41 +01:00

Germano Cavalcante commented

2024-03-05 18:35:59 +01:00

I can notice that the dimension shown for the object is different from the real dimension shown in the viewport.

I'm not sure if this is a bug, as maybe there is some voxel dimension that changes the noticeable size.
Therefore I am marking the report as Needs Info from Developers.

(Tagging @brecht. Ref. #73201: "New volume object type").

I can notice that the dimension shown for the object is different from the real dimension shown in the viewport. ![image](/attachments/3a59b6bc-8a64-4369-ad95-78c95a43b7a3) I'm not sure if this is a bug, as maybe there is some voxel dimension that changes the noticeable size. Therefore I am marking the report as `Needs Info from Developers`. (Tagging @brecht. Ref. #73201: "New volume object type").

image.png

259 KiB

VDB_size.blend

921 KiB

Germano Cavalcante added

Module

Render & Cycles

Status

Needs Info from Developers

and removed

Status

Needs Triage

labels 2024-03-05 18:36:14 +01:00

Brecht Van Lommel commented

2024-03-05 18:42:32 +01:00

This is probably a variation of #113265 and #85312. Things seem to be off by half a voxel in various places, it should be made consistent everywhere. There's Cycles, EEVEE, Workbench, Geometry nodes that all need to be checked.