Sword Art Online - Infinity Moment

[vnctdj]

Hi everyone. Recently I've been playing Sword Art Online - Infinity Moment on latest PPSSPP bulid v0.98-929-g63c4d1e, almost everything works perfectly at full speed (you guys rock ) except for texture upscaling.

I've set Texture Upscale level to 2x for a better looking, it works great for stable textures, but when it comes to animation (eg: character blink eyes) suddenly the upscale is lost, the whole texture (not just animated part) become coarse (pixelized when Texture Filtering set to Auto or Nearest, blurred when Texture Filtering set to Linear)

When the texture become coarsed, I can make it looks nice (correctly upscaled, sharp and clean) again via any action can "refresh" the screen, like changing Postprocessing Shader, Window size (however, changing Rendering Resolution won't help), changing Texture Upscale level and Upscale type...

I've tried using different upscale level and upscale type, nothing seemed to help Attached pictures showing correct upscaled screenshot and coarsed screenshot after animate.

And here is a gif showing the detail

(click to play, upscaled original screenshot by 200% with nearest neighbor)

Merged.