I want to know how do they (artists) created such good terrains for C&C or Warcraft? I am trying to draw little 32*32 blocks (grass,dirt) but they are "ugly". :''( Nebo

Here are some tutorials on doing tile-based terrain (amoungst other things):
http://pixeltutorial.cjb.net/

One way they do it is cheating. In warcraft 3, if you zoom in on the terrain (in the world editor), you''ll see something strange: seams. None of the textures used for terrain actually tile with themselves, they just look like they do because the seams are blended away when you zoom out. That makes creating terrain a LOT easier, because you don''t have to be sure that every tile matches up, just that it almost matches so that when it gets filtered down by the gfx card the seam is hard to see.

Sand Tutorial
Brick Tutorial

Many others are available, just check on good ol'' Google.

If it''s mostly chaotic terrain, you can always tile it by using bilateral symmetry. You make a little piece that''s one-fourth of the tile you want to make, and then you reflect it once on the Y-axis. You take this rectangular thing and reflect it once on the X-axis, and you''ve got a tile that''ll work. If you aren''t careful, you''ll just wind up with twice as many seams, but with a little experimentation, it can be made to work. And really, once you get the edges to tile right, you can redo the interior of the tile to mix it up a little bit.