Proportional editing is one of the basic tools in Blender to start creating simple organic shapes. I find that many beginners struggle with how it works, so I thought that I would try to help out with this article.
We can toggle proportional editing with the hotkey “O”. Once toggled on, start a transformation such as moving your selection. While the move tool is active, scroll your mouse wheel to increase or decrease the influence area around your selection. A white circle around your cursor will indicate the area of influence.
We will now explore some use cases, settings and potential problems and solutions that we may encounter while working with proportional editing. We will start from the very beginning.
Proportional editing basics
We will primarily focus on proportional editing in the 3D viewport for now but keep in mind that proportional editing is also available in all these editors:
- 3D viewport
- UV Editor
- Dope Sheet
- Graph editor
- Drivers editor
In the 3D viewport you can find it here.
Proportional editing is a feature that is toggled on or off and works together with our regular transformation tools. That is the move, rotate and scale tool. We can not, for instance, proportionally edit an inset or loop cut among other tools.
If you are interested in other modeling tools and how they work, this article will cover every edit mode tool you need in Blender.
Related content: More than 30 Blender modeling tools explained
We toggle proportional editing on per mode. For instance, I may be in object mode and turn proportional editing on by hitting “O”. But then I may move to edit mode and in this mode proportional editing is still turned off. Pressing tab to switch back to object mode once again also turns on proportional editing since it is on for that mode.
To use proportional editing follow these steps:
- Turn on proportional editing with “O” or the circular icon in the 3D viewport header.
- Select your falloff from the menu just to the right of the toggle button.
- Make a selection
- Use a move, rotate or scale transformation tool with the G, R or S hotkey.
- Scroll your mouse wheel to adjust the circle indicating the influence size around your selection.
- Move your mouse to see the effect.
- Confirm by left clicking.
Next to the proportional editing tool is the magnetic icon representing the snapping tool. If you want to learn more about that you can read my article on snapping here.
Related content: How to use snapping tools in Blender
Proportional editing settings
For all modes mentioned above except edit mode there is only one setting, the fall-off. These are the options:
- Inverse square
In edit mode we also have these other settings:
- Connected only
- Projected from view
We can reach these settings from the menu next to the proportional edit toggle icon in edit mode.
The connected only setting will allow you to only affect the vertices, edges and faces that are connected to your selection. Keep in mind though that the connection also need to be in the circle of influence. Here is an example where “connected only” does not work if we want to influence the upper part of this mesh.
Also, when we are in edit mode, and we have separate pieces of mesh within the same object. The connected only stops us from manipulating anything that does not have at least one element selected.
The “Projected from view” setting works best when we are in one of the fixed orthographic views such as front, back, right or top etc. Toggle these views with the number pad 1,3 and 7.
I will demonstrate this with a subdivided plane.
If I now select the middle vertex and go to front view with number pad 1 with proportional editing on and “Projected from view” checked and perform a move transform, it will look like this.
It will ignore the fall-off on the depth, and we get a proportional edit only along the Y axis.
Keep in mind that “Connected only” and “Projected from view” does not work very well together. Therefore, make sure that you use one or the other. For instance, with the above example, if we keep both of them turned on the “Projected from view” won’t have an effect.
What to do when proportional editing is not working
When the proportional editing feature isn’t working properly it is most likely because of a misunderstanding of how the tool works.
The first step to take after you made sure proportional editing is turned on is to make sure that it works together with the move tool.
Tab to edit mode and select one vertex. Now press G so that we can move the vertex around and scroll your mouse wheel so that you can see a well sized circle of influence. At this point the surrounding geometry should get moving.
If you have a problem with this make sure that “Projected from view” and “Connected only” isn’t active and try again.
Once you get this to work, you can increase the complexity by trying scaling and rotating.
If you run into a problem that you didn’t expect make sure that your snapping isn’t turned on and that you have the pivot point that you intended. You can check both of these settings to the left of the proportional editing tool in the 3D viewport header.
Proportional editing is one of those tools that once you learn it, it opens up many possibilities and ideas. At least in theory. In practice, it kind of falls in between sculpting and hard surface modeling. But for simple organic shapes that just need a curve to it or those times when organic shapes are introduced into otherwise hard surface or man-made objects it is a great tool.
It is also a great tool when manipulating graphs in Blender even if we didn’t cover it here.
Thanks for your time.