voilà ce que j'ai trouvé,je mets un C/C :
r_TexturesStreaming [0,1,2] - This setting controls the streaming texture system in the game, and if set to 0, textures are not constantly streamed as you walk around, they are preloaded from a cache. While this increases memory usage, and hence may cause additional stuttering on systems with low RAM, for the most part disabling it should cause no problems and will reduce stuttering on most systems. More importantly, disabling it also appears to improve more distant textures without any real drop in performance. You can see an animated comparison by clicking here: Crysis_TexturesStreaming.gif (818KB). As you can see, the distant mountain terrain, especially near the base of the mountain, is much clearer with this setting disabled.
donc lerevo,ce que tu dis est vrai 