HONEYCOMB GRID TUTORIAL in Fusion360 

Even simpler if you plan on 3d printing. Make a solid box. Remove top and bottom layers and just set a hexagonal infill.

Very nice!!! It even works like a sound trap, some kind of difuzor.❤

Another thing. I don't know if I'm going to explain it properly. I've realized that the hexagons splitted between two frames don't match with the hexagon in the frame next. I'm thinking that if you set the diameter of the hexagon as a division of the size of the frame, it would fit perfectly, wouldn't it?

I love your videos. Apparently, you're the only RU-vidr that make mistakes, but don't care. It's a relief, I thought I was the only one who did the things wrong 😂. I have learned a lot today. Thanks.

You can actually still save two more steps! Instead of extruding the "tool body" and intersecting with that, and then doing another union, you can immediately choose the "intersect" type extrusion with the outer profile right after unioning the outline and hexes. This leaves you with a single body that's exactly what you want. I think this is what the comment at 15:07 was trying to say. So the total history up to that point is 1) sketch outline 2) extrude outline 3) sketch hex 4) extrude hex 5) pattern hexes 6) union outline+hexes 7) extrude/intersect outline

finally a helpful hex pattern tutorial