Can't copy/paste Quake 1 map into Doom 3 map

[motorsep]

Since NetRadiant supports both Doom 3 and Quake 1, I figured when copy/pasting one into another (Quake 1 into Doom 3 in my case), the software would simply copy brushes and entities as-is. Nope, Netradiant complains with: "3:2: parse error at '{': expected 'Version'"

[Garux]

Brush formats are different in Q1 & D3. To begin with, planes in D3 are normal + distance, while in Q1 3 plane points.