How do I fix the background?

How I could remove the trasparent part between squares?

Your .capx would be very helpful here.

But from what I see, that looks like it is caused by transparent edges in the TiledBackground sprite.

Most of the time, they are caused by auto-cropping the sprite.

Try to fill the sprite with bucket tool until there is no transparency left.

Here is the .capx:

wikisend.com/download/626270/bakcground.capx bakcground.capx

I tried the bucked tool but didnt work;

Huh, looks all good to me...

Did you export the project as .capx in the same state as the one that rendered the preview you posted?

This is what I get:

Preview in C2:

Preview in Browser:

You seem to have created your project in Construct 2 r239.

Please update to r240 since they fixed Tiled Background Tiling:

[quote:1bekd9h9]Non-power-of-two (NPOT) tiled backgrounds can now tile perfectly without internally stretching it to a power-of-two (POT) size first, which could in some cases degrade the quality

Construct 2 r240 Download

I updated to r240 and still no difference but it seems to happen only in construct and its ok when im looking in browser.

Well, no idea then since it looks fine to me.

Sorry..

click on layer that do not have squares. On left hand there is color pallet click and choose color picker. Pick the squares color for that layor this should work