Im going to tell you How to make your first room, and add new rooms and add a base!FIRST u must install GTKradiant, Guide for that is found here http://tremmapping.pbwiki.com/GtkRadiant1_5-Win32Now if you are done with that here is step 2,
open up GTKradiant with tremulous as the game you want to use.(if it isnt on the games selecting thing u didnt install it right, seek the first guide for help!)
Now, see the 1 in the picture? Thats your grid, It is your BEST friend with GTKradiant. This is the thing that will help you create anything your mind can think of(except that rlly hard stuff that you need to use 3dsmax for xD)
the tool bar should have different stuff in it for u because this is from a JKA tutorial!
I want u to Click that drag ure mouse in it! and it will creat a box! Should look like this!

Dont ask about the box size i dont know how to do it, im using pictures from existing tutorials because im lazy xD
now in the camera, top right box it might looks short or wide or something like that, then u need to switch the veiw on your grid, this is the XYZ butten
Here is a nice thing i like to call player sizes! :wink:
Class, Size Granger 40x40x40
Adv Granger, 50x50x50
Dretch, 30x30x30
Basilisk, 36x36x36
Adv. Basilisk, 42x42x42
Marauder, 50x50x38
Adv. Marauder, 52x52x42
Dragoon , 52x52x55
Adv Dragoon, 64x64x67
Tyrant, 64x64x92
human Standing, 30x30x56
Human Crouching, 30x30x40IMPORTANT TIP! Always make hallways extra big for more fighting room, and room for detail(Pipes, boxes, your minds desire!)NOW back to the room! ok say u make a box thats like 1024(L)x1024(W)x192(H), what the hell does it do its just a box u cant go inside, WRONG! You can go inside it if u hit a certain butten i like to call
hollow!

If you havent figured it out yet, to control the camera in the top left you press
*Right Mouse* on the box, then use the arrow keys to move around in it xD simple huh?
Adding Rooms, and yes it is simple!1. Make another box the size of a hallway you want, and place it next to your big room! put a little bit into the big room, and make sure its not touching the wall the celing or the floor, should look like this!

2. Now you need to subtract it out xD, hit the subtract butten

3. Take ure box and move it out from the main room, then make it so it makes up for the whole by adding 1 block on each side

4. remember that hollow butten you used to make ure big room, WELL hit it again with the new box selected! Just to let you know to select a item press
*SHIFT+LEFT CLICK*5. Delete the doorway! Once you have it selected then hit
*BACKSPACE*, this will remove it and u will have a nice little opening into the next room!
6. now it should look like this
NICE quikies with the program!
the spacebar will copy any item you have selected
backspace will remove any item you have selected
shift+click will select stuff!(do this from the camera window)Ah yes textures u might be asking about! hit the texture butten at the top of the map and load the textures from a map
PART 2!In this part i will tell u how to add a base to your map,add lights, and how to test it!
1. get a base model for a base, im going to make just a simple little thing and texture it!
2. now right click on the grid where you want your building! Then go into team then select the building you want!

3. Your building prolly wont be where u want it, but u can move it around using the grid
IMPORTANT TIP Always ALWAYS ALWAYS place a building at least 16 blocks away from any wall or the floor! like in the picture, otherwise when you start up your map all the building will expload! but i know what ure thingk BUT ZETA i dont want the buidlings in the air... well they will fall to the ground gently when the map starts up so you dont have to worry about that!4. Place all the other items in the base
Here is a list of things u will need and some u might want depending on the size of the map
Need at least 2 acid tubes or machinegun turrets at each entrance into the base
Need at least 2 spawns!
Need a overmind or a reactor!
And for humans u might wanna add a armory if the map is small and there will be alot of kills right away!
5. Now say your map is all done and you want to go and try it out?
wait arent u forgeting something? starts with a L! or ya Lights!
A simple light system in basic maps is pretty ez, now im not telling you, that you need a source for the lights, because on your first map that should be the least of your worrys!
here is how you add them!1. right click on grid and select light, This will ask you for the entinsity put 50 for now!

2. now center the light out equaly in between the celing and floor!
3. just hit space(copys the light) and move every so often should look like dis!

Now when you get better with the editor you can learn how to do sources for lights, like making a moddel for a ligth then making it emit light! Kinda like dis
Compiling the map for play!1. go to file>save Then put the name as somehting simple like test or firstmap, now save it in your map folder, if you dont have one add one, and if you dont know how to add a map you might as well go back to playing tremulous cuz you arent expierenced enuf with a computer!

2. once its saved go to Build>(test) BSP -meta, -vis fast, -light -fast -super 2 -filter
3. OMG its building your map, i bet your shaking in your pants cuz u cant wait to play but just a lil bit longer! once it is done and the dos box has disapeard u may now open tremulous!
4. once ingame you much go into the console, the key is the key to the left of 1 and above the TAB key, it has a ~ and a ` in it! this is called the tilde key and is used as a console key in many games!
5. once you are in it type /sv_pure 0 hit enter, the type /devmap firstmap! then hit enter and it should load!
6. if you have any problems getting it to load post telling us what it said and we will tell you what is wrong xD
MORE IN DEPTH AND ADVANCE TUTORIALS AT RICH DIESALS, these are JKA 2 tutorials but they work in all of radiant so be resourcfull!END for now i might add more later if ure luky PLZ rate it