Quote from portal2tenacious on November 9, 2012, 3:09 pm

As far as I know, you need to make it from scratch. The source SDK doesn't have func_instances. I'm pretty sure you could turn it into a prefab after you make it though.

Quote from FelixGriffin on November 9, 2012, 5:22 pm

You could make the map in a newer version of Hammer, and set up the "run game" params to call the old version of VBSP. Then instances work, although you have to collapse them each compile.

Quote from ChickenMobile on November 9, 2012, 7:34 pm

FelixGriffin wrote:

You could make the map in a newer version of Hammer, and set up the "run game" params to call the old version of VBSP. Then instances work, although you have to collapse them each compile.

That seems a bit tedious however useful if you just want to copy over whole portions of your map (with tonns of instances) - but I would probably collapse all the instances first and just copy-paste.

If you just want to put in a couple of observations rooms, copy the opened instance and paste the brushwork into your map. Grouping would help to keep it together.

Quote from josepezdj on November 10, 2012, 2:34 am

ChickenMobile wrote:

Grouping would help to keep it together.

portal2tenacious wrote:

you could turn it into a prefab after you make it though.