Hey, i know that this is a stupid question, but, how can I fix this: ?

Do you mean the square gridlines? Try building the lighting. Or your snap to grid value might be super high

looks like a landscape to me, if so… you should try following the docs:

or some other tutorial. just google it.

you have to apply a landscape material to get those to go away & best to know how first. :wink:

Build the lighting or change the directional light to ‘moveable’ :slight_smile: