Rayshade renderer stretches view compared to Interactive renderer.

[Roger H. <rog...@mi...>]

We draw all our perspective scenes using the View Angle Aspect camera.

Comparing the RayShade renderer output for a non 1:1 aspect ratio  
scene, with the output from the Interactive renderer ( and the  
Microspot Renderer ), we get a slight stretching out with RayShade.

Whilst it is not critical, it is a bit annoying at times when you  
accurately clip (in the PhotoShop sense) the scene you want using the  
interactive renderer and then wait for RayShade to do its thing, but  
then find the clipping is wrong in the final output.