Any way to turn of filtering on textures?

Blitz does offer trilinear filtering, though? No filtering = per pixel mapping. Linear = Linear maginification, unfilted minifigation. bilinear = linear mag and min, and finally tri-linear = linear_mipmapped_mag, linear min, which is b3d's default state.
I'd say it's a overprotective use of lod bias that's responsible for the blurry washed out look a lot of textures in b3d suffer from.