Mesh3d ignores lighting with orthographic projection
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Description
It seems like lighting of Mesh3d is ignored when orhogonal projection is used, example image:
With exactly the same plot, but with perspective projection, lighting is fine:
I just wonder if this is a known issue, or is it a bug somewhere?
I tried to play around with camera locations and lighting parameters (diffuse, ambient, etc.).
Only ambient lighting has effect when orthographic projection is enabled (as you can see in the picture above the whole mesh only has a single flat color) - maybe shader issue?
The version of plotly.py that I am using is 5.6.0.
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Research direction
Start by reproducing the Mesh3d example with orthographic and perspective projection in plotly.py 5.6.0, then compare the rendering behavior and investigate the suspected shader path. Done means diffuse and other non-ambient lighting affect the mesh under orthographic projection without regressing perspective rendering.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- python
- Domain
- data-visualization
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 35/100