10 ways to make Holes in Blender

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Create and close holes with Blender with out using booleans

0:47 Create a hole in a box
1:55 Create a cylindrical hole in a plane
3:37 Loop Tools addon
5:10 Create a hole in a cylinder
15:05 Close a hole with Grid Fill
16:00 Close multiples holes with select non Manifold
18:00 Close hole using the Bridge
20:00 Close circular holes

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Model a Cylinder with Holes

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Bent Perforated Metal Sheet
simple deform modifier, the array modifier, and the boolean modifier to quickly create a bent perforated sheet!

0:00 - Introduction
0:11 - Creating your sheet
0:39 - Adding thickness to your sheet
2:00 - Adding a single hole in your sheet
3:06 - Creating multiple holes in your sheet
5:29 - Adding the bend to your object
7:20 - How to get a smoother result
8:37 - How to get an EVEN SMOOTHER result
11:23 - Applying materials to your object and the holes
12:25 - Quickly switching perforation/hole types
14:24 - More modifier tutorials

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FILLING HOLES in Meshes with Grid Fill

0:00 - Introduction
0:11 - The Blender Secrets book
0:40 - How to use grid fill to fill in a hole in a mesh
1:22 - Grid fill on more complex shapes
2:06 - Using grid fill for quad geometry on complex shapes
3:07 - Simplified blending
4:13 - How adding topology can create better geometry with grid fill
5:30 - The Blender Secrets book

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How to cut hole in plane without Boolean Modifier in Blender
Perforated Metal Hole Pattern

0:00 How to make hole in Blender
0:10 Add Plane as a Face
0:25 Subdivide Face in Edit Mode
0:48 Convert Square Hole to Circle Hole
1:17 Add Subdivide Surface Modifier
1:48 Add Array for duplicating plane with hole
2:45 Add thickness using Solidify Modifier
2:59 Add Round Edge using Bevel Modifier
3:37 Perforated Metal Sheet Done

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Filling the gap between two meshes or Objects - Grid Fill

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Filling in mesh holes - Grid Fill