The second series of Quake 4 samples also come from the Purification Center level. This scene, however, is much brighter than its predecessor.
Like the previous scene there remained minimal differences between the NVIDIA and ATI image quality. So is there anything that can be gathered as a whole from these tests? Granted image quality comparisons can be subjective, but in the video playback tests we felt that NVIDIA more often than not had the advantage with more realistic colors and greater details. However, in the low-light environments the ATI fglrx drivers had provided greater detail and brightness. In the Quake 4 tests, the NVIDIA and ATI visuals were nearly identical to the human eye. Once ATI introduces the R600 series shortly we will follow up with a greater number of image quality tests to compare ATI's and NVIDIA's finest under Linux.
You may share your thoughts on which graphics manufacturer has better image quality under Linux on the Phoronix Forums.