Regarding the Dwarven Stronghold map - Steel Rat

Hello,

This question is directed to Steel Rat, as it appears that he is the author of the map entitled: Dwarven Stronghold at:
http://rpgmapshare.com/modules/g2/d/14384-2/Dwarven+Stronghold.jpg

My Dundjinni skills are okay, but they could certainly be better. I am very eager to learn. I want to increase my skill to be able to create maps as good as the Dwarven Stronghold map above. So, I had a few questions regarding the map:
1. How did you create the lava effects and where did you get them from?
2. How did you create the rock effects?--Specifically, how were you able to create broken sections of rock and create an illusion of depth?
3. Any advice on what pieces to use to create a stronghold castle like this?
4. Where did you get the train tracks from?
5. Any advice on what I could do to achieve the same level of detail that you have in this map? I have to create a similar dwarven stronghold for my campaign and want to draw something that is comparable in detail to yours.

Any help would be incredibly appreciated.

Thank you!