Creating a shadow model in xlights apparently is the go in order to be able to export from xlights to whatever pixel controller that you have. Keith has a video on youtube about shadow models. Other than that in xlights I have my props made as a custom model and I stagger the pairs of channels horizontally and vertically from each other. It's kinda on my to do list to create a video on how to configure all of my 2811dc boards for easy setup. I actually do all of mine a very old school method as I don't use/haven't used the fpp connect feature or controller uploads. Having a FPP master running FPP1.5 might have something to do with that.