I will write you down few steps:
1. Sky setting: go to Scenario -> Map Preferences in WE toolbar and set sky there (drop down menu)
2. To angle doodads you must use negative values in field Maximum Pitch Angle (degrees). How can that be done?! Simple hold shift when clicking on field. Note that negative values are not in degrees, but in radians, so for rotating doodad by 90 degrees you must set value to -1.57. Note: You must allow editor to have negative values in File -> Preferences -> General
3. To raise height of doodads simply hold Ctrl and press PgUp or PgDown. To be able to move raised doodads without reseting their height go to Module at WE toolbar and ucheck Reset Fixed Object Heights (last option in drop down menu)
4. Use good imported models and skins
5. You need A LOT of patience, creativity and hard work