I can make some items unstackable, and you can already turn off stacking if you need a specific item (check the button in the inventory)
Viewing post in Voices of the Void 0.7 feedback
The issue with stacking objects in votv is that all items are kinda "unique", some objects carry too much unique variables like Float values, strings etc, so i cant use Minecraft method of stacking. I can mark some items unstackable like batteries, paper, labeled items etc, and keep food and trash stackable.
And no, it displays the volume of one item, i will implement this in the next patch or smth
Speaking of stacking, a possible workaround (and general upgrade), specifically for food would be to create object variants for food at different "bite remaining" levels. A good start would be same model, lower weight, to make opened containers distinguishable from unopened ones. I'm not sure how your game handles items, but a variant variable (from which weight and mesh/model are derived) would be perfect for this.
Let me know your thoughts, i'd love to contribute.