Zandronum

• 1) Draw the sector which will contain the room.
  2) Draw the room sector and tag it 1.
  3) Draw the table sector and tag it 2.
  4) Draw the legs of the table and set their floor's height equal to the height you want as bottom side of your table.
  5) Draw the first dummy sector. Its floor's height will be the height of your room, its ceiling height will be the rooftop. Set his floor and ceiling textures: its floor texture will be the ceiling texture of your room, its ceiling texture will be the rooftop texture. Select one lindef of this dummy sector and give it the action 160 - 3D Floor. Set the Sector Tag as 1, its type as 1 (this will make it a solid sector) and its alpha to 255 (this will make it opaque).
  6) Draw a second dummy sector identical to the first drawn, but this time set the Sector Tag on the lindef as 2.
  7) Draw the last dummy sector and set its floor equal to the height you want as bottom side of the table, its ceiling equal to the height you want the upper side of the table. Use the action 3D Floor on one of its lindefs and set its Sector Tag 2. The texture you will apply on this lindef will be the texture used for the border of your table.

Spoiler: Tutorial about Vertex Slope Things (Open)

Alright, in this tutorial we are gonna learn how to use the Vertex Slope Thing (Vertex Slope Floor and Vertex Slope Ceiling). Map Format: Doom in Hexen format or UDMF format.

First of all, we need to draw where we are gonna use it, in this case we will build a cave pillar, so we draw a classical doom pillar.



Next step is drawing the contour of the pillar again but with a bigger size. Make sure that it has the same name of vertices!.



Now draw triangles as can be seen in the next image to define the sectors where we are gonna apply the slope effect. Do not forget to disconnect those sectors via "Make sectors tool" (M)



Place the Vertex Slope Floor thing on each vertex of the sector, even on the empty sector that its the pillar!





Go to 3D view and raise those Vertex Slope Floor things (remember that you will need the GZDoom 3D mode pluggin if you are not using GZDB).



Interesting, huh? Lets gonna increase the difficulty! Draw another contour with a bigger size and repeat previous steps.



Do not forget to make the same with Vertex Slope Ceiling.



You can make the pillar even more natural if those vertices do not have the same Z heigh.



Apply the texture you want to that pillar and voilá. We have built a nice looking cave pillar!

xxslayerrulesxx wrote: is one able to make a tunnel under an already made sector? i tried but i keep hitting an invisible wall that clips like crazy....

Espio wrote:

xxslayerrulesxx wrote: is one able to make a tunnel under an already made sector? i tried but i keep hitting an invisible wall that clips like crazy....

Not by normal Doom vanilla means to my knowledge. You'd have to start using 3Dfloors to be making "tunnels" or "bridges".