[Deprecated] Hammer Editor 3.5 Tutorial - Terrain Mapping [Basic]

RECENT NOTE (March 2013):
This method of creating terrain depends strongly on what you are trying to accomplish and is not suitable for big areas, since it uses twice the amount of wpolys. Also theres a bigger chance it will create clipping bugs in complex vertex structures.

Rather use regular blocks and shape these with the vertex tool (but without distorting them, or else you would create Invalid Solids).

I will create a tutorial about this method too.

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Hey hey,
since some people were asking I will write a small FAQ:

Q: How to select multiple vertices in Vertex-Mode?
A: Hold down CTRL while selecting the vertices.

Q: How to move selected vertices without mouse?
A: Use the Arrow-Keys (Up/Down/Left/Right) on your Keyboard. The grid size defines how far the vertices will move.

Q: How to make an edge between two selected vertices?
A: Press CTRL+F (this only works when compiling an RMF-File).

Q: How to flip the side that is going to be cutted while in clip-mode?
A: Press the Clipping-tool button again (SHIFT+X).

Q: How do I get model rendering in Hammers 3D-View?
A: 1) You have to use the 3.5beta version of Hammer.
2) Extract the Half-Life models from Steams half-life.gcf (../Steam/steamapps/half-life.gcf) into your ../valve/models -directory.
3) Use a modified Half-Life Game Definition File (e.g. halflife-cs_expert.fgd), it will contain information for hammer to display the models you have placed into your models-folder.

Q: How do I check for errors?
A: Press ALT+P. (!This wont show you Leaks!)

Q: I cant select anything in the 3D-View, whats the problem?
A: 1) If you are using a modern ATI card and/or drivers, try to turn down or completely turn off Anti-Aliasing in your graphic card utility (e.g. Catalyst Control Center / AMD Vision Engine Control center).
2) Also try placing a atioglxx.dll file into your Hammers directory.

Q: Where do I find any files?
A: Please, just ask GOOGLE, thanks!