See my other mapping tutorial for 1st maps.
I am also thinking about Mapping Pro, witch will show you to make a HOUSE.
Snowy, watery, dark, sunset, FLATLANDS.
Sounds good. Lets make it snow. Go into Mission Editor Creator. Mission objects, Environment, Precipitation. Name it Snow. Make it snowA. Not snow, because that is some cheap bubble crap. If you don't like it, just go up and click the button called Precipitation. Then press delete. You can change it in base/data/specialFx. Water is 3 slots above Precipitation. Click on it, but do not press OK yet. If you want brownish water, change the surface texture. Change the size to whatever you want. Might want to make it higher. Drag the Z stick O' blue. Now go into Mission editor inspector. Change its color. Play with its fluid. You may notice something. It pulls down! I actually don't know how to fix that. On to the lighting! Be in Inspector. You actually should be there. Click Sun. Change its color and ambient. Yay! You have changed the lighting. Now, lets make the skybox cooler! Click Sky-sky. Open up media. Change the matireal list from what it is to base/data/skies/sunset/resource.dml. You now know how to change lots O stuff. Watch out for my next tutorial, and my Mapping PRO one!
