In Offline games, you can move around maps by yourself.
There is a console command you can do to see where collision is on maps.
Firstly, bring up console:
Hit “`”, and or “~” this brings up console.
To go to any map, type: switchlevel OBJ/EXE_Mapname. Under this list are mapnames.
[spoiler](Copy/Paste these into console)
switchlevel OBJ_Bridge
switchlevel OBJ_CanaryWharf (Underground)
switchlevel OBJ_Trainyard
switchlevel OBJ_Victoria (Terminal)
switchlevel OBJ_Whitechapel (Chapel)
switchlevel EXE_Canal (Market/Dank Market)
switchlevel EXE_Overground
[/spoiler]
Once loaded into your map, open up console and type the following:
‘show COLLISION’ without quotation marks.
With this command you can see every line of where props, and where the maps collision is.
Using this command, you can do many things to help you. So far, I have found map errors where you can exploit maps, and most importantly understand the map way more.
(This does not work in public, and or competitive matches!)
Example of Collision:
[spoiler]http://i.imgur.com/7DCLVvV.jpg[/spoiler]