Hi Ulrich,
(The model and lightsource are a shared graph, right?)
Yes, that's right.
With regards to the different lighting, how is your model
tessellated? If it's coarsely tessellated and/or you're using face
normals then the lighting calculation might only be done on the corner
vertices and interpolated from there.
The model is a simple box with no further tessellation, and just face
normals. However, the effect is the same with more complicated and
higher-tessellated models. I think the detail of the model shouldn't
effect the lighting in this case... all the cameras are looking at the
same lit scene from the same point, just with slight offsets in the
projection and view matrices. Other than possibly subtle differences in
specular highlights, I wouldn't think the scene should be lit any
differently in each of the views. I realise the lighting won't look
great on a low-tessellated model, but I think it should be consistent.
I figure it's like taking multiple photos and stitching them together
into a panorama... the world doesn't get lit completely differently just
because you turn left and right a bit. :-(
Cheers,
Julian.
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