ok there are some different things of maps..
u need gtkradiant 1.5.0first the start of a map.
we will make a basic room to learn some things about mapping.
-Create a brush 320x320x16, this is our floor. To do this look at the grid numbers and left click and drag out a box 320x320 in top view. Then in a height view window make it 16 units high, which is one grid unit. If you press 'q' when the brush is selected you can see the dimentions of the brush.
-Now we'll create the walls. Make a brush that's 16x320 and 256units high. Move this brush up 1 unit on the z axis. With the brush still selected, press space bar(which duplicates the brush), press the z-axis rotate button(which rotates the brush by 90 degress) and position the brush so that it is flush with the floor. Do the same to create the other walls.
-Now we need a roof. Select the floor, press 'spacebar', then drag the duplicate up using the z-axis until it is flush with the top of the walls. You should now have a cubed room.
-Now we should texture it. In the 3d view position the camera inside the room, then press ctrl alt shift left click in the camera window and select a face of the floor. Now load up some textures, i'll use a floor texture from the egypt floors. Goto Textures > egypt > egypt_floor_sd and select block-16sq. Now deselect the floor by pressing escape, and select the 4 wall faces (using ctrl alt shift and left-click). Load up the egypt wall textures by going to Textures > egypt > egypt_walls_sd and select stripedbrick01. Lastly the roof needs to be textured. In this case I will use a skybox texture. Select the roof face and load Textures > fueldump and apply the fueldumpsky texture. The sky might not look very real or textured badly but because this texture has shader properties with it, when seen in game it will look much more realistic.
-we need some entities
First we need an info_player_deathmatch. This entity is where spectators first spawn when entering the game. To get this right click the 2d view and select info > info_player_deathmatch.Move it to the centre of the room and position it just above the floor.
Next we need the spawns for the axis and allies. For the axis right click 2d view, team > team_CTF_redspawn and for the allies goto team > team_CTF_bluespawn. Position these two entities next to the info_player_deathmatch.
-In Enemy Territory we have to give our map mapcoordinates that are used for the command map and the compass etc. To do this we need to input the values into our worldspawn of the top left xy cordinates and bottom right coordinates. Click on any brush (except for the entities) then press 'n'. The entity window will appear. Now in key field type mapcoordsmins and in the value field type in the lop left coordinates of your map, which in my case is-16 16. Now we have to do the bottom right cordinates. In key type mapcoordsmaxs and in the value field type in the bottom left coordinates, which for me is 336 -336. Now its a good idea if these coordinates are square. A simple way to do this is to create a brush from your mapcoords, if both sides of the brush are the same then its a perfect square naturally. It is important for it to be square when later in your map you have to produce tracemaps and command maps.
-Lets save the map now as test_tut.map. Save it in ...etmain/maps/test_tut.map folder.
Next it's time to compile the map. In the bsp menu there are a whole list of compile options. For this compile choose Q3map2(test)BSP -meta -vis -light -fast -filter. Three consols will appear in series and the compile is finished when 'Connection closed' is displayed in the console window. If you get a map leaked error, then either your room isn't completely sealed off from the outside void or your map is missing an info_player_deathmatch(other errors can occur when your map gets more complicated but for now these are the only errors u could/should get).Time to go test!!
When ET loads, press the tilde ` key, the console then gets pulled down. Next type these commands that are in bold,
g_gametype 2
sv_pure 0
devmap map_name*
*Substitute the name of your map here etc. devmap test_tut. The map will then load. If it freezes when you try to move then your map coords are wrong and you might a have to reposition them. If your map freezes when you try to select a side, then your missing the axis and allies spawns(team_CTF_redspawn,bluespawn). Hopefully you now have success!!!
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btw still a nice job 
