Tempest Rosca

Hola! Two questions for you - am hoping you can help because am getting a little frustrated and I'm sure there is a really easy solution. I love taking pictures in SL - and whilst am far, far from being as good as lots here - i really find it rewarding and enjoy taking picture most days - however, I seem to be having issues with my shadows. Whilst am working in my studio - which is in the sky - the shadows usually work perfectly however there are times when whatever WL i work which, the shadows don't seem to be very defined - ie, they are subtle when they sometimes can be fabulously unique the following day!! The real problem comes when i got out and about and take pics in different locations and on different sims - I can't seem to get shadows to work properly at all - the WL changes, however, when i used phototools >edit Sky> and slide the Est Ang and the Day sliders,,,any changes (if any at all) are really really subtle - am finding this amazingly frustrating. My graphic are on ultra and my computer seems to handle lag really well - it's a good spec so I've been told - so am unsure why I've just started experiencing this issue. Also the pics I take inworld on my screen, don't seem to rely as well when i save to disk (4000 wide,,higher sometimes, PNG,) and DOF also don't come across in my pics when I take them in world Am unsure if this is all related - but am hoping one of your fabby people could help. Am happy to skype and share screen so that you can see what am talking about - am just at my wits end :( Also - and I can imagine this has been posted her before - but could someone send me a link to how best to tweak my graphic card to take the best quality pictures - details of my card/computer below: CPU: Intel(R) Core(TM) i7-2630QM CPU @ 2.00GHz (1995.53 MHz)Memory: 8107 MBOS Version: Microsoft Windows 7 64-bit Service Pack 1 (Build 7601)Graphics Card Vendor: NVIDIA CorporationGraphics Card: GeForce GT 555M/PCIe/SSE2 Thanking you in advance - feel free to contact me here or in world or via email (tempestrocsa@gmail.com)Tempe <3