Moving Hemi lamp with HDRI changes scene lighting with strange results

[Jgrover111]

Windows 10 Home Version 1803 Build 17134.48

Blender version: 2.79b
LuxCore version: 2.1alpha0

When moving a hemi lamp with a HDRI in the Bidir engine, seemingly unexplainable anomalies happen in the render. The images look as if another light has been added to the scene when only the Hemi exists.

Hemi.zip

[Dade916]

This should have have been already fixed in the latest source. You can find the relevant discussion here: https://forums.luxcorerender.org/viewtopic.php?f=4&t=304

[Jgrover111]

Currently testing the latest source and the results seem similar. Will upload images soon.

[Dade916]

It should be this fix (LuxCoreRender/LuxCore@7884d6c) and may be available only on "v2.0.x" branch (i.e. not yet merged on the master).

The reference issue was LuxCoreRender/LuxCore#106.

[Jgrover111]

Tried with LuxCore standalone 2.1alpha0, same result. Will try latest source once I figure out how to build it 😄

[Dade916]

The fix for LuxCoreRender/LuxCore#106 was written after the release of v2.1alpha0 so there isn't yet a pre-compiled binary including the patch.

[Dade916]

Yes, it seems to work fine with the latest sources:

[Jgrover111]

Brilliant!