Maniphest T76189

Eevee Renders OpenVDB Wrong (sometimes)
Closed, Archived
Actions

Assigned To
Philipp Oeser (lichtwerk)
Authored By
Atomic (atomic)
Apr 28 2020, 3:53 PM
Tags
  • BF Blender
  • EEVEE & Viewport
Subscribers
Ankit Meel (ankitm)
Atomic (atomic)
Brecht Van Lommel (brecht)
Clément Foucault (fclem)
Germano Cavalcante (mano-wii)
Philipp Oeser (lichtwerk)

Description

System Information

system-info.txt23 KBDownload

Blender Version
Blender 2.9 alpha

Short description of error
At certain camera angles the Principled Volume shader ignores polygons between the OpenVDB volume and the camera. This seems to appear if you raise the BlackBody intensity above zero. It is very rare and only at certain camera angles.

Eevee OK at this angleAt this angle, the smoke can bee seen throughA side view of the same thing

Cycles rendering the same view, not displaying the error.

Exact steps for others to reproduce the error

  • Open attached file

eevee_open_vdb_render_issue.zip3 MBDownload

Event Timeline

Atomic (atomic) created this task.Apr 28 2020, 3:53 PM
Brecht Van Lommel (brecht) changed the task status from Needs Triage to Needs Information from User.Apr 28 2020, 4:06 PM
Brecht Van Lommel (brecht) added a subscriber: Brecht Van Lommel (brecht).

We require an example .blend to investigate the issue.

Atomic (atomic) added a comment.EditedApr 29 2020, 2:04 AM

This is what I see, using 660gtx 2Gb. Driver 397.31.

Here is a BLEND and a single frame from one of the VDB sequences. Frame 97.

eevee_open_vdb_render_issue.zip3 MBDownload

Brecht Van Lommel (brecht) changed the task status from Needs Information from User to Needs Triage.Apr 29 2020, 7:55 AM
Ankit Meel (ankitm) added a subscriber: Ankit Meel (ankitm).Apr 29 2020, 9:13 AM
Germano Cavalcante (mano-wii) changed the task status from Needs Triage to Confirmed.Apr 29 2020, 8:17 PM
Germano Cavalcante (mano-wii) updated the task description.
Germano Cavalcante (mano-wii) added a project: EEVEE & Viewport.
Germano Cavalcante (mano-wii) added subscribers: Clément Foucault (fclem), Germano Cavalcante (mano-wii).

I can confirm, and the problem seems to be seen only on Eevee (Workbench looks ok).
But if I decrease the volume range between the Start and End, the problem seems to go away.
So I'm not sure if this is a bug, limitation or even something that could be improved.

Germano Cavalcante (mano-wii) changed the task status from Confirmed to Needs Triage.Apr 29 2020, 8:20 PM
Philipp Oeser (lichtwerk) closed this task as Archived.Jun 18 2020, 11:57 AM
Philipp Oeser (lichtwerk) claimed this task.
Philipp Oeser (lichtwerk) added a subscriber: Philipp Oeser (lichtwerk).
In T76189#920283, @Germano Cavalcante (mano-wii) wrote:

I can confirm, and the problem seems to be seen only on Eevee (Workbench looks ok).
But if I decrease the volume range between the Start and End, the problem seems to go away.
So I'm not sure if this is a bug, limitation or even something that could be improved.

I also think this is controlled by the range between Start and End, so .e.g. Setting these to 1m / 25m, all occlusions seem to work without sorting problems.
So unless @Clément Foucault (fclem) has objections, I think we need to close this report.
Thx reporting anyways!