OR if you have two types of monsters for example a ghost and a chicken... you could put them into a family called "enemies" and then make it enemies.count.
System Compare: ghost.count+chicken.count is less or equal to 0
-> Go to next layout
theres no "right" way just do what ever you feel works best for you
[quote:1t1nmwwv]3d etc. etc.
Yes, but seeing as you've just started construct i say practice a lot of other stuff before you go anywhere near 3d, Besides basic 3d box stuff and Z elevation. its not a straightforward process and is would pretty much be considered an ADVANCED "technique", there are .cap files on the forums available demonstrating a multitude of ways to do 3D stuff as scidave said feel free to check them out yourself .