God Of War:Chains Of Olympus

[LTgoodevil]

Hello, I've just started using ppsspp recently and I'm using it on Android Galaxy S6.
I'm using fixed 30fps from this thread http://forums.ppsspp.org/showthread.php?tid=22159

In buffered mode with frameskipping set to 1 and Auto I can play game and it runs 12-20/30 fps and 90-100 speed because of auto frameskipping.
This is not smooth, but OK and playable.

If I switch to non buffered rendering game is silky smooth 30/30 fps without frameskipping, but I get black sky and square boxes around orbs.
Sorry I'm new to this, but is this expected behaviour in GoW with non buffered rendering? One post was mentioning fixing square boxes by actually switching to non buffered mode.

Thank you very much!