So recently I've been playing custom Doom 2 wads and I've made my own using Doom Builder 2. I would appreciate constructive criticism on ways to improve my Doom building skills. Before you play the map, I'd appreciate it if you read my tips/questions.
(Here's the link)
http://www.mediafire.com/download/q266trhk63rygh6/firstwad.wad
Tips/Questions
1) There are two secrets in this map, but I don't know how to make it so the game displays "A secret has been revealed!". Any advice?
2) Once the level ends, the game goes on to play the regular Doom 2 levels. How do I fix this?
3) Where could I learn how to make custom weapons/characters for Doom 2?
4) How would I properly make a custom sky texture? (If there's any proper way to do it?)