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Opaque texture that lets light through !!!

Alro

Alro

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26
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france
Hi,
On my latest 3d model, the Kish Bank, I have a problem with the texture.
On the landing just below the helicopter platform, I positioned a white flash as in reality.
The problem is that even though the texture opposite the platform is opaque, when a helicopter is landed, the flash lights up the underside of the helicopter, but when there's nothing there, the flash doesn't go through the texture! I don't understand this phenomenon.
Perhaps a solution?
Thank you very much
 
Maybe a screenshot or a video would be helpful to understand the issue


As a rule of thumb, blender lights are not blocked by geometry
See the diagram attached, a point light on the roof will illuminate both the upper pavement and the ground pavement (plus the the people on first floor and the car in the garage below)

To avoid this, avoid blender lights, and make illumination with emissive textures only
 

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