Please help-Collision Size question

Could anyone please tell me what the Collision size for units in WE is for, exactly? I change it from zero through to huge for a unit, but it doesn't seem to make any difference when I play my map.....
the effect I'm after is where some units can pass between 'gaps' in the terrain (say, gaps between rocks) and other units can't chase them through (because they're too 'big')
I know there's loads of Diablo style maps out there already, but I'd like to do something like the original Diablo where loads of units charge at you and you have to defend yourself by using doorways and scenery to 'bottleneck' your enemies so they can't all reach you at once

There are two relevant collision sizes, there will alwyas be two units colliding and thus both collision sizes must be accounted for. You should check to see how "wide" the door is and what the collision size is for your creature and any creatures following it.

thanks for reply StrangeBrute

So does Collision Size affect units colliding, not one unit and terrain (or doodads) colliding?

well its how big impact is , depending on the 2 collision sizes , myself , i dont think its very important so forget it unless u r a perfectionist

LOL...Collision size? I am sure everyone know abou this. It is how big your units will take space. For example Tauren have Colision Size of 40 which could hardly go to some narrow places, while Peon have Collision Size of 10 which could crawl into almost everywhere. Collision Size is very important, cause if it is so small it will raise your hero chance of ESCAPE from the battle and not being SURROUND and get beat up. :D

0_o

*shakes head*

"I change it from zero through to huge for a unit, but it doesn't seem to make any difference when I play my map....."