Why not use a similar inventory system as was used in Jagged Alliance 2?
Different sized slots, where the bigger slots could also hold more smaller items. Plus item weight and a maximum carry capacity that depends on strength and impacts the performance of the (player) character. It also featured a map inventory system that allowed for instant visibility (and direct access if you were in that particular area) to all items in different locations on the map. Personally I've never come across a better inventory system anywhere else ever.
[Linked Image]

[Linked Image]

Last edited by rattaplan; 29/07/13 10:16 PM.