5$ Flatcolour
10$ Cell shaded
15$ soft shaded
+5$ simple background inside keyhole
Examples -
Flat - https://cdn.weasyl.com/static/media/04/69/f0/0469f041d0a99728a54a16e7c315aed7ac284d9b105bf7061ea898c2af7da574.png
Cellshading - https://cdn.weasyl.com/static/media/46/c8/3c/46c83c0105c3fff4bf051bae33776219354aac89c04be5ce0abbfae3856c9784.png
Soft shading - https://cdn.weasyl.com/static/media/92/ac/ec/92acecd2adf82faf52f5de907da926b8b65223cc93e2344440927672af971c54.png