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| ID | Project | Category | View Status | Date Submitted | Last Update | ||||
| 0001259 | LuxRender | Core | public | 2012-08-11 23:24 | 2013-02-25 05:14 | ||||
| Reporter | feuersteinxx | ||||||||
| Assigned To | jeanphi | ||||||||
| Priority | normal | Severity | minor | Reproducibility | always | ||||
| Status | closed | Resolution | fixed | ||||||
| Platform | linux | OS | debian | OS Version | testing | ||||
| Product Version | 1.0RC2 | ||||||||
| Target Version | Fixed in Version | 1.2 | |||||||
| Summary | 0001259: Bidir slightly darker than path | ||||||||
| Description | Simple scene with an area light. The bidir/metropolis version is slightly darker than the path/random version. Attached the lxs-files and a comparsion image. Interestingly the shape of the difference has a form of a disc | ||||||||
| Tags | No tags attached. | ||||||||
| Mercurial Changeset # | 5e9a32b23f26 | ||||||||
| Requires Documentation Update | No | ||||||||
| Requires Exporter Update | |||||||||
| Attached Files |  bug.zip [^] (730,685 bytes) 2012-08-11 23:24 | ||||||||
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(0003608) jeanphi (administrator) 2012-08-31 12:50 |
I'm unable to find the issue in the code. The bidirectional integrator when in path tracing mode (light depth = 0) gives the same result than the path integrator. However by just adding one more light sample (light depth = 1), so still without any real light path, it starts to become darker. This makes me believe that the issue is some sort of numerical accuracy artefact, similar to what we have with spherical light sources. |
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(0003824) jeanphi (administrator) 2013-02-04 12:46 |
The flux member of the bidirectional vertex must not include the scattering at the vertex. |
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Issue History |
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| Date Modified | Username | Field | Change |
| 2012-08-11 23:24 | feuersteinxx | New Issue | |
| 2012-08-11 23:24 | feuersteinxx | File Added: bug.zip | |
| 2012-08-21 07:12 | jeanphi | Target Version | => 1.0 |
| 2012-08-28 04:44 | jeanphi | Assigned To | => jeanphi |
| 2012-08-28 04:44 | jeanphi | Status | new => assigned |
| 2012-08-31 12:50 | jeanphi | Note Added: 0003608 | |
| 2012-09-02 12:27 | jeanphi | Target Version | 1.0 => |
| 2013-02-04 12:46 | jeanphi | Mercurial Changeset # | => 5e9a32b23f26 |
| 2013-02-04 12:46 | jeanphi | Note Added: 0003824 | |
| 2013-02-04 12:46 | jeanphi | Status | assigned => resolved |
| 2013-02-04 12:46 | jeanphi | Fixed in Version | => 1.2 |
| 2013-02-04 12:46 | jeanphi | Resolution | open => fixed |
| 2013-02-25 05:14 | jeanphi | Status | resolved => closed |
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Issue History |
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