formating animation, avatars, polygons, sub d and normal or displacement maps for

hello,
using croquet to make interactive world. i am an animator. i need to find out about how to make subdivision polygons and sub pixal displacement.

also would like to bring better avatars and animations into croquet.
can i be pointed in the right direction.
 
what is the polygon limit with croquet please.

i am a 2 but would like to become a 3. learning squeak right now

thank u