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Whenever I'm adding loop cuts to my model, I drag the cut to the edge of the model and type in a value (such as 0.5 meters) and it goes back to the center and works from there..?

I'm pretty sure I'm doing it right, I just want to have exact measurements since I'm making building models and I have a set of guidelines for them all, such as 0.5 meter thick walls, 1 meter wide doorways, 2 meter wide windows and so on. How do I get it to stop A) Snapping the loop cut back to the center when I add one, and B) When I do create loop cuts then it will change how big the rest can be. I want it to just keep loop cutting based off the original face size, not the new faces create by adding the vertices, and I need it to not snap the cuts back to the center, but from the side I drag them to. Sorry if I didn't explain properly, I'll try to explain further if required. Also the shortcuts to work faster would be nice :D https://www.youtube.com/watch?v=rAZ9KEGjSUk&feature=youtu.be <- If you skip to around 5 minutes you'll see him start creating a building, I want to build like that but yeah xD

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  • $\begingroup$ If you put a loop cut on a cube at its center, and then add another one on the right of that and then type <gx.1>, the loop moves .1 units on the x axis, as expected. If you type <ggx.1> instead, it will move .1 of the current distance on that axis. I'm not completely clear how this works, but it's what you're looking for. $\endgroup$
    – Anthony Forwood
    Commented Aug 29, 2016 at 21:01

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The loop cut tool or Loop Subdivide as it may be called, is a two step tool that subdivides the chosen edge loop and then starts an Edge Slide.

In the first stage you can use the MW MW or numpad-/+ to increase/decrease the number of cuts being made. You can also press E to keep a single loop parallel to the next edge loop and F will flip that to the other side.

In the second stage you are sliding the new edge loop/s along the edge that you are subdividing, the value you enter is a factor relative to the edge being cut with 0.0 being in the centre and 1.0/-1.0 moving the new edge loop to either end of the edge being cut.

For more precise placement of vertices you want to use other tools that allow movement based on global position. The snapping tools make it easy to align items to each other.

When moving vertices and objects you can restrict movement to an axis and enter a distance to move. eg GX0.5 will move the selection 0.5 units on the x axis.

In the mesh display panel which can be found in the properties region N of the 3DView you can display the length of selected edges while editing.

edge lengths

The scene settings allow all sizes to be shown using metric or imperial units rather than an arbitrary unit.

units panel

As you are modelling buildings you might be interested in the Archimesh addon which you can download here - this addon has recently been added to the standard addons and will be included in the 2.78 release.

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  • $\begingroup$ Yay, that helped quite a bit, but I have a new problem now xD when I'm editing the faces I need precise measurements since I need to make buildings, so the walls all need to be 0.5m thick, doors 1m wide etc, but when I create more faces it only goes from the face I'm working on, instead of the entire face (like, the original one). Is there a way to keep it to the exact measurements so that it doesn't change the scale? $\endgroup$
    – oWo
    Commented Sep 1, 2016 at 14:36
  • $\begingroup$ NEVERMIND I UNDERSTAND IT ALL PERFECTLY NOW, THANK YOU! $\endgroup$
    – oWo
    Commented Sep 1, 2016 at 15:20
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The shortcut for "Loop cut and slide" is Ctrl+R. Use the shortcut (while in edit mode) then hover your mouse over the mesh edges and you will see a pink loop. Left click to apply it, then move the mouse (to slide the loop) and left click to apply again. If you want more options (after doing this) hit T to open toolbox, and you will see more options (see image below).

enter image description here

Hope this helps and feel free to ask ;)

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