Look up anisotropic filtering, that's probably part of the effect your seeing, most modern cards have settings to help this type of artifact
BTW JPEG images have to be decompressed before they are used, thus they do not save you any graphics memory, DDS is better because modern cards handle the format as native and no decompression is needed __________________________________________________________ Gordon Tomlinson [EMAIL PROTECTED] IM: [EMAIL PROTECTED] www.vis-sim.com <http://www.vis-sim.com/> www.gordontomlinson.com <http://www.gordontomlinson.com/> __________________________________________________________ From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of TANG Fangqin Sent: Monday, September 08, 2008 8:19 AM To: [email protected] Subject: Re: [osg-users] Texture not clear in far view Hi Robert and J-S, Thanks for your reply. Yes, the DDS format is a good solution to control the mip mapping. But now since my texture is JPEG, it seems that I have to let OSG generate mipmaps. I find that the default filtering mode is LINEAR_MIPMAP_LINEAR for MIN_FILTER. I tried some other filtering modes like LINEAR, and the texture performance becomes better in far distance. The texture, however, doesn't look very stable and is kind of dithering when you move the scene. When you stop, everything is just fine. Any hints for the possible reason for this? Thanks a lot. Best regards, Fangqin
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