Is there an ambient music that's actually engaging and has a bunch of really intricate and interesting sounds and doesn't just sound like a synthesizer with one or two notes being held down at a time?
There's lots of amazing industrial but is that what you're asking for or do you still want the ambient thing? Because if it's the latter, just check out dark ambient. Stuff like Burzum, Lustmord or Sunn O))))
I am already pretty heavily into power electronics and I think I've found all the good industrial so I dunno. I am more interested in dark ambient like lustmord. a lot of it isn't engaging enough though,
I like it when it has a bunch of sounds. The long droning notes in ambient are what often kill it for me. Like I forget that it's even there sometimes unless it has a lot of variation and I can pick apart what's happening at a given moment.
Check out postlude they have some nice musical sections in their music. Not quite ambient but definitely interesting. Here's their link. They have an ep coming out in 2015.