Visual Mode Editing of sloped 3D floors

A tutorial for GZDoom UDMF

Let's start off with a map which already has the 3D floors.

Clipboard-1 (100K)
Example map

Open the map in Visual Mode. Looking at the 3D floors from above press Alt to enter the Visual Editing Mode. Moving the cursor to the edge of a 3D floor will show the edge in yellow. Clicking on the yellow edge turns to orange and lock it in. To exit this mode press C or quickly go out of and back in the Visual Mode.

In the video I try to show how it is done.

Once done with placing the slopes, the map can be further edited , for example

Screenshot2 (370K)