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NVIDIA GeForce 6600 GT Preview - Page 2 of 6

OPENGL TEXTURE FILTERING

The next several pages will allow you to examine the texture filtering quality of the 65.76 driver. Under OpenGL, Doom 3 is being used, which offers application controlled texture filtering and allows comparative images to be captured from a consistent position. This capability is important in conducting a proper image quality analysis and was accomplished by loading a saved game. After a saved game is loaded in Doom 3, the player always begins play at the same position.

Doom 3 - Scene 1

Darkness dominates in Doom 3, but there are areas with enough light that make them useful for comparing image quality. The three comparative scenes that are being used in this article were captured with the high quality image setting enabled in the driver control panel.

The high quality image setting provides the best texture filtering quality although it does not make use of the adaptive texture filtering capabilities of the GeForce 6 Series graphics processing unit. When the high quality image setting is selected in the driver control panel, all optimization settings are forced to off and cannot be changed, which will result in reduced performance. Also noteworthy is that anisotropic optimizations are not used in OpenGL.

Doom 3 - Scene 2

All of the images used in this comparison were taken at a resolution of 1280x1024. Full-size images can be viewed by clicking the smaller images. For the best viewing experience, it is recommended that automatic image resizing be temporary disabled in your Internet browser. In Internet Explorer, select Tools from the menu and Internet Options. Click the Advanced tab, scroll down to the Multimedia section and uncheck the Automatic Image Resizing box.

Doom 3 - Scene 3

With the exception of converting sections of the comparative screenshots to a 90 quality JPEG with Irfanview, the resulting images were not altered in any other way. JPEG images are being used for on-line comparisons, while high quality PNG images can be downloaded (2.4 MB) for off-line viewing.

Next Page: OpenGL Texture Filtering Continued

Last Updated on September 7, 2004


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