Extend Borders

14 votes

This Tool is useful for extruding border edges of an editable poly. You can also add a tilting angle and choose to use corrected corners.

Additional Info: 

How to use:

For installation instructions download the .zip file and read the readme file included. In max, open the “Customize User Interface” dialog and locate the tool in the category “RacoonScripts”. After you have made a hotkey, menu item or button, simply select some edges of your editable poly object and start the tool.

Extrusion Depth = the absolute amount the new edges are extruded
Angle = The tilting angle of the extrusion
Smoothing Group, Inherit = Inherits the smoothing group ID from the adjacent faces
Respect loop ends = If you are not using straighten corners, selections that end on corners are extruded perpendicular to the bending, if this is not desired, activate this option – it will extrude the those edge perpendicular to only the selected edges.

Tips & Tricks:

Alt + Apply = negate the angle value and apply
Alt + Cancel = undo the last apply

Known problems:

* Distorted polygons (e.g. skewed and rotated) may be problematic for the straighten corners algorithm. It’s better to disable this feature in these cases.
* Since it’s a Maxscript it is not very fast in calculation speed. Higher edge counts may slow down the tool considerably.


*1.0 initial release

Version Requirement: 
tested with max 2014, should also work with earlier and later versions
straightencorners_cmprspd.gif1.55 MB


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NaderScript's picture

God bless you developer!

A wonderful script for those with subtle taste in 3d modeling indeed ;)
Thank you so much

Love is all

kavehmad's picture


I installed it but it doesn't works with version 2016

kyle108's picture

is it possible to get a

is it possible to get a version of this script where the extension depth spinner has 3 decimal places instead of 2? most of my work is done at smaller scales.

Mirk217's picture


I use 3DS Max 2013 x64 wines 8.1 script is not run at all.
click on the button of the reaction is simply no.

miauu's picture


Adding angle option is in my todo list, but I have to find time for it.

vidivini500's picture


Nice miauu :)
Maybe you can add angle option too, is useful

miauu's picture
vidivini500's picture


Yes, I understand what happend.
Thanks for your time!

DeadClown's picture

hmmm, yes, there is indeed a

hmmm, yes, there is indeed a problem. If you have a look at the image attached: edges (1) and (2) are producing a problematic vector constellation which is causing a flip. It is currently not so easy to solve in my code but you can avoid such situations by adjusting the edge flow. If you're creating an edge (3) all works fine. Will see if I can fix that in the future. Thanks for reporting!

fixing.jpg 92.5 KB
vidivini500's picture


Well, is a random shape but I'm curious if you can see something bad. Think is not perfect shape with quad polygons, maybe this is the problem.

Edit: I copied your shape and works fine, maybe is a problem of angles?
Very rare

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