You've played CS:GO's maps. Now see how the poor mappers made them. Get Hammer++ here: https://ficool2.github.io/HammerPlusP...
0:00 Hammer++
1:04 Realtime lighting
3:10 Fog
3:38 Skyboxes
4:45 Rope physics
5:19 Particles
6:40 Placing things in your level
7:13 Sprinkling lots of props
8:00 Putting props on the ground
8:22 Physics tool!
9:25 Hammer can't count
10:00 Other
10:16 Conclusion