I have tried this on 3 different aircraft with great success, the Carenado Bonanza, A2A Cherokee and Alabeo Piper Sport, so it will for sure work for others as well.
The antialiasing in 3.2 seems improved, but the cockpit panels and gauges still shimmer alot in some aircraft if you don't use 4xSGAA, which as you know is a framekiller when flying through heavier clouds.
So to begin with, disable SGAA if you have it on, set 4x or 8x AA in the sim and then go download DxtBMP if you don't already have it. Imagetool for FSX/P3D should also work fine.
DxtBMP supports both bmp and dds files and can be downloaded from here: http://www.mwgfx.co.uk/programs/dxtbmp.htm
Link at the bottom of the page.
Let's take the Carenado Bonanza as an example.
First make backups of the texture folders, just in case. For the Bonanza we will make changes to the textures.common, texture.interior1 and texture.interior2.
So here's how you do it, it's all about mipmaps!
If you check the file sizes in textures.common for example, you'll see they are 257KB, 1025KB and 4097KB depending on their size. These numbers however tells you they are NOT mipmapped.
So load up DxtBMP and on the right hand side under "MipMaps" make sure the "Include when saving" box is checked.
Now it's just a matter of loading one texture at a time into DxtBMP and straight away save it again, overwriting the original file.
You'll notice the file size grew a little, which means it now includes mipmaps.
Do this at least for all the larger detailed textures. You can do them all, it won't hurt anything, You can do the exterior textures as well. Knock yourselves out
Also in P3D, the "Mipmap VC Panels" should be checked, otherwise your GPS displays will still be shimmering.
There you go, that should keep you busy for a while :wink: