Sorry for lack of information. Here is my setup. When I had GTA before (different 360, different TV) it had no problems.
Xbox 360 Slim
LED LCD HD TV 47"
Using HDMI port
Setting is set to HD
PIC of shadows: http://www.flickr.co...in/photostream/
Edited by Anthonymrb, 09 August 2013 - 04:54 PM.