[osg-users] Shadow projected on the opposite side too

[Sebastian Messerschmidt]

Hi Pierre-Jean.

This might have to do with wrong culling mode or geometry for the 
shadowmap-generation. The culling mode should be front-face and your 
geometry should be correct (e.g. if you do front-face culling you should 
have some "inner" sides to contribute to depth.
Can you tell us what GPU you are on, and what geometry is showing this 
problem?

Cheers
Sebastian


> Hi dear OSG users,
>
> I'm wondering how to correctly use osgShadow. As you can see on the 
> file I have attached, the shadow map is projected on the receiving 
> object also on a face which should normaly not receive the shadow from 
> the sphere (on my example the light is at the top right corner). It 
> behaves like if the top face did not stop the light to continue its 
> path through the object (which is not transparent).
> My example is with soft shadow but I tested with other techniques and 
> it is the same behaviour.
>
> Is there a way to avoid such behaviour with osgShadow ?
> Thank you.
>
> Cheers,
> Pierre-Jean
>
>
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