udk is slowq, and when i test out my level to run ( i placed light on the map) and it doesent show the ground i walk on, not even the light, i can walk, but not see where i am going, i have the december 2010 beta,also i have windows 7, an amd semperon 145 processor 2 gigabyte RAM, 495 hard drive space, 2 gigabyte ddr3 memory, nvidia geforce 6150 se graphics, and multi in one media card reader, what shopuld i get to make udk run faster,and is there any game designing software thats better than udk, please answert my questions.