Colors

src/inventory.gd

@@ -1,6 +1,6 @@
 extends Node
 
+class_name Inventory
+
 @export var open_on_top: bool
-var liquids
-var solids
-var gasses
+var inventory: Array[RuntimeSubstanceData]

src/resources/substance.gd

@@ -8,6 +8,7 @@ class_name Substance
 @export var boiling_point: float
 @export var color: Color
 @export var prefer_scientific_name: bool
+@export var is_solution: bool
 
 func get_formula() -> StringName:
 	return scientific_name if prefer_scientific_name else formula

src/runtime_substance_data.gd

@@ -0,0 +1,7 @@
+extends RefCounted
+
+class_name RuntimeSubstanceData
+
+var substance: Substance
+var amount: float
+var temperature: float = 20.0

src/runtime_substance_data.gd.uid

@@ -0,0 +1 @@
+uid://coq5iah4er0lc

src/substance_holder.gd

@@ -7,5 +7,5 @@ func _ready() -> void:
 	if substance:
 		var jar_fill_material = $"../JarFill".material_override
 		jar_fill_material.albedo_color = substance.color
-		if substance.melting_point > 20:
+		if substance.melting_point > 20 and not substance.is_solution:
 			jar_fill_material.albedo_texture = preload("res://assets/textures/solid.png")