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I'm trying to work with a rectangular mesh and I've been using Snap to Grid and Absolute Grid Snapping but I've noticed some of the snapping doesn't snap where I expect and seems to be dividing the grid by 2.

I am working in blender 3.3LTS and I have changed the following settings:
In Scene, Units is set to None
Viewport Overlays Subdivisions are set to 16 from the default 10
Snapping Mode is set to Increment with Absolute Grid Snap enabled
The move/transform coordinate space is set to Global

Here are some images to explain what I'm seeing. I select the piece of the mesh I want to move/alter:
enter image description here

I press G while holding Ctrl and instead of snapping to the grid it snaps the vertices to the centers of each grid square:
enter image description here

Further movement leads to proper snapping by the increment, just not on the grid: enter image description here

Of additional note, the snapping works as expected if I only select a single vertex or a line segment that is parallel to the orthographic camera perspective(so it appears as a vertex from that angle)

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2 Answers 2

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As the tool tip for the Absolute Grid Snap says in the first screenshot of the answer by @L0Lock, the snapping is based on the pivot center. So you can change what is snapping to the grid by changing the pivot center, for example to Active Element. This way you can use a vertex in Vertex Select mode or an edge in Edge Select mode for snapping:

active element pivot

Example for the active vertex snapping to the grid:

vertex snapping to grid

Or, if you want it vertically centered, you can use an active edge to have its center snap to the grid:

actve edge to grid

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  • $\begingroup$ Thank you, this is what I was missing. I noticed after I posted that it was only present when the mesh was oddly divisible by the subdivisions so I figured it was some kind of centering thing. $\endgroup$
    – TheSeventh
    Jan 18 at 13:36
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    $\begingroup$ Ooooh I misunderstood the tooltip as meaning it would always use the center of selection x) Nice! $\endgroup$
    – L0Lock
    Jan 18 at 21:13
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I press G while holding Ctrl and instead of snapping to the grid it snaps the vertices to the centers of each grid square:

Actually, it does snap to the grid. But from the center of your selection, not from a specific vertex:

enter image description here

Not sure whether there's a way around it.

You could use the addon CAD Transform for blender 3.x. It's only for version 3.x, but as "pay what you want" pricing, whereas the update for 4.x is paid.

With it, you can toggle the CAD transform tool, ⇧ Shift select its vertex and grid snapping options:

enter image description here

Then press G to start moving, click a vertex to snap from, optionally press ⇧ ShiftC to toggle between local and global grid, and click where you want to snap to.

enter image description here

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