Not sure if anyone will find this useful but I needed something that would make sure my level blocks I was making in 3ds max were convex so I could take them into wed.

http://www.melax.com/3dsmax/

this is the website to download the plugins

and this page explains basically what it does

http://www.melax.com/3dsmax/hull/index.html

It creates a hull for any object thus making it convex, and so far its the closest plugin for 3ds max without spending money that I found.

I should add the plugin is for 3ds max 7

Someone has asked me about this because they needed it and the site was either taken down or is down currently. I uploaded the file to my server so anyone can still download the plugin unfortunatly it wont explain how to use the hulls like the website did maybe I will explain it later on when I get some time.

Novodex 3DS Max v7 Plugin