I have been using a (Min,Mag,Mip) all Linear, in my effects file. With a ps_2_0 compile option, can I assume that my GPU will always be capable to support Anisotropy? I know that it's always safer to define an alternate 2D sampler for anisotropy filtering, and use that technique when GPU caps indicate the anisotropic support. But isn't ps_2_0 already sort of ensuring those capabilities?
On a side note, I am observing a pixel-wide edge on top and left of my rendering window, which kinda looks like some sort of noise that is imitating the main window. Is this some filtering related issue or something else?
I am using direct3d9 APIs for rendering.