LuxCoreRender / LuxCoreRender/BlendLuxCore

LuxCore technical problem, Light cannot pass through Area

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Dominant language
Python
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Description

The problem with (Area) in the first image you can see that the laser does not pass through completely, but only halfway, this is due to the fact that ((Area) the red light source) is blocking the laser from passing through, and also (Area) is blocking all light sources, this can be seen in visualization 2, there is no red sun. This is not true. Correct when the light source (Area) transmits light. For example, in visualization 3 there is a sun and in visualization 4
nothing interferes with the laser

1
Снимок экрана (595)

2
Снимок экрана (587)

3
Снимок экрана (599)

4
Снимок экрана (596)

.blend file: https://drive.google.com/drive/folders/1_93Rijk5PHeUSHwM_WNjHTceJRrf76U0?usp=sharing
I have prepared the scene for you, here you can clearly see this problem, the red folders indicate the problem with the light, the green folders show how it should work (Area)

OS: Windows 10
Blender version: 4.0.2
LuxCore version: 2.8 alpha1

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First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Download the linked .blend scene and reproduce the area-light behavior in Blender 4.0.2 with LuxCore 2.8 alpha1. Compare the red problem folders with the green expected folders to trace how the area light affects the laser and other light sources. Done means the prepared scene renders with area lights transmitting light as shown in the expected examples.

Written by the indexing model from the issue text.

Assessment

Tech stack
python
Domain
computer-graphics
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
35/100

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