Also if the objects need to render in a certain order, you can set the sorting order for the object once it is placed in the level. Select it in the viewport and then in the Rendering tab of the Details panel, expand all of the settings until you find Translucency Sort Priority. Higher numbers will render in front if lower priority objects. Here’s a bit more info:
.unrealengine.com/latest/INT/API/Runtime/Engine/Components/UPrimitiveComponent/TranslucencySortPriority/index.html