Sorry for being so inexperienced but how do I change the material to masked?
My guess is that I need to change the default material.
In the meantime I will try your other solution. Thanks so much for your help!
Edit: I tried your other solution and it seems to have worked but…
…the colour difference is still lost. For some reason the “middle-ground” sprites become the same colour as the foreground ones. The rgb values are very similar. R: 0.04, G: 0.04, B: 0.04 for the middle ground, and R: 0, G: 0, B: 0 for the foreground. I still don’t understand why they appear different colours in the viewport to how they do in the game though. A long fix would just be to re-colour the sprites and replace them if there is no other solution.