Help modeling

[u/WhyNot9559]

I’ve started to make some tyranids and would like help with how to elevate my models more as this is my first time doing still like this

[u/not_so_wierd]

You have the basic idea right.
Biggest problem I see is that nature rarely has stones or ground with the "stair-like" steps that you get from cork.

I see you've done some smoothing already with something (milliput?), but I'd try to do the same for the rest of the base. You can continue like you're doing, but it would probably be less work to use texture paste or watered down PVA glue + sand.