Depends on where you’re inclining it and how much. If you’re worried about the picture coming out weird, don’t. It’ll come out just fine. The issue you may run into is if you put it on a steep incline and a strong gust of wind knocks it over. If you’re going to incline it, be sure to use the stakes which were included and maybe a few ties if it is a particularly gusty day.
For more information please check out our guide setting up a great backyard setup
Or take a look at our recommended projectors and screens