3ds Max :: 2013 Viewport Texture Quality

after working for a while with Max 2013, i have noticed that texture display in viewport is a very poor quality compared to Max 2012, and it is same with display of environment map in viewport.

I have found some ways to manually set texture quality in viewport here, but i would like to know if there is any way to make Max 2013 viewport texture display EXACTLY IDENTICAL to way it was in Max 2012.

For example, if i manually change nitrous texture resolution, then resolution improves, but if i display some environment bitmap in viewport, i get extreme lag when minimizing/maximizing viewports. About 2-10 seconds to minimize/maximize viewport lag whenever there is an environment map displayed in any of the viewports. As soon as i disable display of environment in viewport, viewport minimize/maximize task is instant again.

In Max 2012, when i display enviro map in viewport, i have absolutely no delay in minimizing or maximizing what so ever.

So i would like to know how i can make Max 2013 display same quality of textures as Max 2012, and make it perform same way as in Max 2012 (no lag when switching viewports).From what i understand, viewports in 2013 should be optimized, therefore actually faster, not slower.