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Votes
0
Found in [Package]
4.6.0-preview
Issue ID
1117129
Regression
No
[HDRP] Volumetric fog blocks Directional light pointing up
Steps to reproduce :
- In an HDRP scene
- Add a sphere, a directional light, and scene settings
- Set fog type to volumetric in the scene settings
- Rotate light to make it point up
Result: The light doesn't affect anymore the sphere.
Expected: The light should still affect the sphere, even when lit from bellow.
Notes: The volumetric fog applies an attenuation of intensity to the directional lights, I guess that some math is going wrong (NdotL ?) when the light is coming from bellow.
Comments (1)
-
Ava42
Jan 12, 2023 16:57
Unreal engine have this:
"Extinction Scale" (Controls how much the participating media blocks light.)we must have same feature.
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Resolution Note:
A directional light is a light that is infinitely far away. If you add global exponential fog, it extends infinitely far downwards. Therefore, all light is attenuated over this infinitely long light path. If you need local lights, use box lights instead.
Fog always affects lighting. The volumetrics check box only enables the volumetric contribution of light.