Just uncheck override lightmap resolution flag. The number will only be used if this flag is checked, otherwise don't worry about it. For super small assets, a 16 or 32 pixel lightmap may actually look worse than being vertex lit. Be sure to bake and then look at it in 'Lighting Only' mode to see if your lightmaps are…
Thanks everyone for the feedback! So I have added another UV channel for light maps and have it set up in Unreal, but still not getting the shadow results that I want. Any recommendations? Currently I'm setting the building pieces at 64, the cliff pieces at 128, and small props at 16 or 32 depending on size. Not seeing a…