Quote - > Quote - Now maybe it's heresy to use a spot light for the sun, but if it looks okay to me, I don't see a problem with it.

Great tone and colour.  But the non-parallel shadows on the wall make it obvious you used a spot rather than infinite light.  Not sure what the advantage is.

The sun can cause non-parallel shadows. Uneven double planed glass, wide angle camera lenses, curved walls...

https://secure.flickr.com/photos/citadelmonkey/2750224736/in/pool-92891572@N00

https://secure.flickr.com/photos/lulatahula/2697745459/in/pool-92891572@N00

The effect is a bit severe in the render, though. I agree. But I'd have to re-render a similar set up to be convinced. Right now, I'm not inclined to bother.

Getting back to the original question, textures are commonly set with a GC of 1.0 which is optimal for printing but not for viewing. Poser Pro's GC converts the texture GC of 1.0 to 2.2 which is optimal for a PC monitor. The Warorc texture may have been set to a GC of 2.2 using Photoshop which would give it a superior look back in the pre-Poser Pro days. There is a script that comes with Poser Pro -- the gamma correction script (Not at home, not sure where it sits)  -- where you can reduce the texture's GC (by -1.2) which, if what I suspect is true, will make it render correctly using Poser Pro's GC.       

Quote - The sun can cause non-parallel shadows. Uneven double planed glass, wide angle camera lenses, curved walls...https://secure.flickr.com/photos/citadelmonkey/2750224736/in/pool-92891572@N00
https://secure.flickr.com/photos/lulatahula/2697745459/in/pool-92891572@N00

The effect is a bit severe in the render, though. I agree. But I'd have to re-render a similar set up to be convinced. Right now, I'm not inclined to bother.

In these photos, the shadows look like that because of perspective distortion and it looks fine because they match other parallel/perpendicular lines in the image (like the photo frames and window for example)

In your render OTOH the scene is almost isometric, while the shadows look like someone were standing outside shining a flashlight inside. It looks really odd.