My custom joke decoration using decorate isn't working

[kirbyguy11]

Let me show you why...

 

Source Port: GZDoom

Editor: Ultimate Doom Builder

Map Format: UDMF

 

Top-down view:

3D View:

[boris]

You probably didn't change the offset of the sprite, so it's drawn below the floor. You can try to move the thing up and see if the sprite shows up at the bottom of it. You can change the sprite offset in SLADE.

[kirbyguy11]

I already fixed it, after a few weeks.