The Persistence of Vision Raytracer (POV-Ray).

This is the legacy Bug Tracking System for the POV-Ray project. Bugs listed here are being migrated to our github issue tracker. Please refer to that for new reports or updates to existing ones on this system.


FS#78 - Wrong rendering of BeamTest-Scene in 3.7.beta.35a

Attached to Project: POV-Ray
Opened by Michael Lindig (lindig) - Thursday, 04 March 2010, 08:56 GMT
Last edited by Christoph Lipka (clipka) - Saturday, 19 June 2010, 01:22 GMT
Task Type Possible Bug
Category Backend → Photons
Status Closed
Assigned To No-one
Operating System Windows XP
Severity High
Priority Normal
Reported Version 3.70 beta 35a
Due in Version 3.70 beta 37
Due Date Undecided
Percent Complete 100%
Votes 0
Private No



following scene will not be rendered correctly in 3.7.beta.35a:


maybe it is a configuration problem or it is a real bug.

This task depends upon

Closed by  Christoph Lipka (clipka)
Saturday, 19 June 2010, 01:22 GMT
Reason for closing:  Fixed
Additional comments about closing:  No further beta tester feedback for way over a month now; I consider that good news.
Comment by Christoph Lipka (clipka) - Monday, 22 March 2010, 18:53 GMT

Had a first look at this, and it seems like a bug to me. I'll investigate.

Comment by Christoph Lipka (clipka) - Friday, 26 March 2010, 22:30 GMT

First analysis indicates that the use of cylindrical light sources plays a role in this.

Comment by Christoph Lipka (clipka) - Saturday, 27 March 2010, 00:50 GMT
  • Field changed: Status (Investigating → Requires testing)
  • Field changed: Percent Complete (0% → 100%)

Identified the underlying cause as a stupid bug messing up photon direction calculations for parallel light sources. Fixed with change #4934.