Using [Intersect Knife] and [Intersect Boolean] tools - Blender 2.8 Tutorial - YouTube
Do intersecting faces matter? I'm new to blender, and 3d printing, will be getting a resin printer in a few weeks. I tried to merge by distance and it didn't help. I
How to union, difference, intersect objects | Boolean modifier | Blender 2.81 | Tutorial - YouTube