Will these lower my FPS?

[SaVas]

Most ground textures will not diminish frame rates as they just replace the ones default in FS9.

Thats one thing I like about BEV is the ability of using files that are actually an inprovement over the default as you can choose the same
size which I believe is 512 x 512 or less graphic intensive ones that are 256 x 256 (going from memory) or a mix of both.

Flight Environment is the same and nice thing about this is you can use DXT3 cloud textures which is barely noticible graphically but
allows you to have more clouds without much impact