The subdivide tool can be located in the edge menu, which can also be accessed using the hotkey of Control + E. The first reason is that it can already be accessed from two different menus that both have their own shortcuts. There are two reasons why no hotkey is assigned to the tool. However, this is not the case with the subdivide tool despite the fact that it is one of the most popular tools used in editing 3D objects. The majority of tools in Blender will have a hotkey, or keyboard shortcut, assigned to them. Why Does The Subdivide Tool Not Have An Assigned Hotkey? Surprisingly this is a rare case of the modifier having a shortcut assigned to it, rather than the base tool, but why is this the case and how can we assign a hotkey to the subdivide tool itself? However, you can use the hotkey of Control + 1,2,3,4,5,6 to activate the subdivision surface modifier to the object instead. There is no blender shortcut assigned to the subdivide tool, nor is there a shortcut for the unsubdivide tool, which is used to perform the function in reverse. It can be used in almost any workflow, even for low poly models. This can help speed up your process of modelling certain objects, and also help you with a non-destructive workflow over which you have full control through modifiers.One of the most popular tools in 3D modeling, the subdivide tool has become the go-to tool for adding geometry across a model without disrupting its topology or its basic shape. While un-subdividing sounds like something you'd only do to reduce the complexity of your mesh, we've gone over some additional ways in which you can get some interesting and unique effects with the un-subdivide tool and decimate modifiers as well. In the case that un-subdivide just doesn't work for any reason whatsoever, you can always switch to using the decimate modifier as outlined in the sections above.Īnother fool-proof yet slightly more time consuming solution (depending on the complexity of your geometry) can also be re-topologising the mesh by manually deleting and creating new faces. Un-subdividing should now work properly again. To avoid this, use A to select the entire mesh and press Alt+J to convert all tris to quads. Press M and select "By Distance" to merge vertices that are within a certain distance of each other, hence deleting any duplicates.Īnother reason might be due to the mesh being made of tris instead of quads, as this often interferes with un-subdividing. To solve this issue of double geometry, go into edit mode and press A to select all the vertices/edges/faces, it generally doesn't matter which mode you are in. This could, for example, happen if you extrude a part of the mesh and right-click to cancel it's movement: the mesh has been extruded and there are double vertices but they may not be visible to you. The most common reason is the presence of extra geometry that might not be visible to the user, but makes it difficult for Blender to calculate and perform un-subdivision actions. Issues can arise quite often when working with more complicated meshes and trying to un-subdivide them, and this could be for a number of reasons. Troubleshooting when un-subdivide is not working The number of iterations for the un-subdivide tool work similar to the decimate modifier: an odd number of iterations changes the orientation of the faces while an even number doesn't. It should be noted that this panel goes away after you click on any other object or window, and so the number of iterations can't be changed afterwards, although you can always just un-subdivide a second time in case you want a larger number of iterations. To adjust the number of iterations, open the Last Action Settings panel that pops up on the bottom left of your screen right after selecting the tool. Next time you hit F3, the option will already be entered in the search bar so you simply only need to press Enter.Īfter selecting the option, the action is carried out with a default of 2 iterations. With all of the relevant geometry selected in edit mode, press Ctrl+E and select Un-Subdivide from the list, or press Ctrl+E and immediately press U to select the option while the list is still open.Ī quicker way to do this is to hit F3 on your keyboard to show the action show bar, start typing Un-Subdivide, select the relevant option and hit enter (usually the un-subdivide option pops up after only typing "unsu."). This is a quicker way to un-subdivide your mesh if you don't require a non-destructive workflow, or if your geometry is generally modelled efficiently and isn't too complex. In edit mode, there is also an un-subdivide tool that allows you to reduce the number of faces in your mesh in a very similar manner as the decimate modifier. This is just a simple of examples of the use of the decimate modifier, the possibilities are endless.
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