Problem with image when building game to Windows Phone 8.1

I’m having a weird problem when i try to build my game to Windows Phone… the backgound images got messed up.

The images are png and use sprite and i use NGUI.

this is image after i deploy to wp8.1

http://postimg.org/image/izyig3e1h/

Can you guys have and solution for this problem ?
Thank You

Hi,

I’ve seen an issue similar to this one some time ago myself. In my case, it was a case of phone GPU driver not being able to handle very large textures. What size is that background image? Could you try cutting its resolution in half? What phone are you testing on?

Hi Tautvydas Zilys Thank you for answer . I use nokia lumia 720 to test it and background is 513 * 1024 and i expand bg.
I think maybe my bg is too large.

Hmm, that shouldn’t be happening for a texture of that size - we were seeing the behaviour with textures larger than 2048x2048. It wouldn’t hurt to try reducing it though.