How to create 'levitating' map

[WatermelonPL]

How to create "levitating" map

 

1. Open GZDoom Bulider
2. Create new map
3. Create "inner" map
4. Create border:
5. Set border to "Not shown on automap": 
6. Set both ceilings to F_SKY1
7. Set border height to 0

 

 

RESULT:

 

WARNING: Use only with OpenGL renderer - if used with Software renderer (with other sectors) it would look like this:

Instead of this: