Re: camera angle affects lighting

[Frank C <li...@si...>]

On 26-Jul-04, at 1:26 PM, Keith Wiley wrote:

> Has anyone ever noticed that the camera angle can affect the apparent
> illuimation of surfaces?  As I rotate the camera, the brightness of a
> surface changes even though that surface's location in global space, 
> and
> with respect to the environmental lights never changes.  I can observe
> this effect with a null shader, or lambert or phong.  All three do it. 
>  I
> think I am only seeing it with alpha-layer 32 bit textures.

The transparent surface renderer does not respect illumination state so 
you may actually be seeing errant specular highlights and/or lambert 
shading on null shaded objects. It could also be related to sorting 
errors, but it's hard to say without seeing the scene in question.

I'd post some relevant bug ID's but I think sourceforge is having 
problems (there are 0 bugs listed?)

Frank.