Border Occlude

Hello everyone!
This addon allows you select back side of a mesh without enabling X-Ray or Wireframe mode. So, you don’t have to press Alt+Z or switch the modes every time you want to include rear geometry(points, edges, faces) into your selection. And this saves a lot of time and clicks! It works very similar to Modo style selection: left mouse button (LMB) - selects front geometry, RMB - selects front+rear geometry. You can assign MMB instead of RMB also.
There are two modes: Rectangle Selection and Lasso. You can switch between them by clicking the icon at the screen or assign a shortcut.

After installation you have to adjust some settings for your right mouse button(RMB).
You’ll see the following area inside of the addon:

For 2.8, 2.9

Release Notes

* Added the ability to change the position of the icon

* Fixed issue with saving hotkeys after restart

* Installation is greatly improved. It is much easier to install the addon now
* Fixed the issue with loading config if Blender was closed when BO was installed selection mode
on box
* Fixed the issue with re-configuration hotkeys after restart
* Now the addon consists of 1 file instead of 3
* Added the ability to set and change hotkeys inside of the addon properties

Thanks to @Antony for translation and instruction.


What is the difference from default Blender feature that “Limit selection to visible” button can do?

Automatically turns on and off occlude.
If you used modo or nvil then you will understand why you need this little addition

Thanks a lot!
I was missing this feature so much.

Update v0.2
Now it’s lasso

You yourself need to install hotkeys. I use the keyboard layout of maya so I can not get what hotkey you need

id - view3d.occlusion_macro

Zip file contains non specific file extension which I suppose had to be “.py” but after renaming and installing addon it gives error :confused:

Try this
Please report me if will repeat again

Works like a charm with blender 2.78c and windows 10 thanks for the addon its very handy :smiley:

Do you think the addon would benefit from having shift+ctrl to deselect? I do use occlude in a pie menu is already quick but after testing your addon I think it could be something good to have if it had some deselect option.

There is.

Thanks for your reply. I meant having both functions available. That seems to replace selecting for deselecting?

I’m sorry, I have very bad English. I can not understand what you want
The video shows 3 modes: New select, add selection and reduce selection
You just have to make 3 different hotkeys, like in the video.
That’s all he knows.

No problem I think I deleted some of the keystrokes by mistake so that’s why I was confused too when you showed me that picture.


Yeap, that was it I just created a new keystroke it is now working as it should. Thanks for that picture which made me remember I deleted one of the keystrokes by mistake.

BorderOcclusion for 2.8

Hello everyone!
This addon helps select backface polygons without enabling XRAY or Wireframe mode.
You will spend lesst time clicking for using this operations.
If you worked in modo you probably noticed how cool is that - to select front faces with LMB and backfaces with RMB! That’s why this addon exist.

There are two modes - Rectangle Selection and Lasso. You can switch between them just by clicking on the button in menu

Install -

Download -
Key for hotkey view3d.occlusion_macro


Dont work :confused:


Work with RMB, but dont work with left mouse button.Can You make this work also with LMB?

Most likely you have busy LMB. Have you turned everything off for sure? The script is not tied to the key you choose. Tomorrow after work I will check

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The addon works with the left mouse button, but you need to make a lot of effort to disable all conflicting functions. I do not recommend using the left mouse button.

I use it with alt+ LMB (with alt+ctrl, alt+shift) tweak

LMB - normal selection
Alt+LMB - Occlude selection

btw. thanks for the script. Very usefull!

I have little problem with icon display:

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Yes, there is such a problem. I will apply for this bug BF

Perhaps I screwed something up when installing this and trying to get the three new keymaps setup but on the latest 2.80 I get this error as soon as I click on the icon:


Any idea on what I might be doing wrong, or is it because things have changed so much in 2.80?