>>5868346Two words.
Funda - Mentals
You see in 3D unless you have one eye you can observe something from multiple angles.
As an artist you will never draw an object only and abstraction of it made by your brain. If you simplify it like the modified box of the finger sketch. You can turn anything.
You don't need exhaustive reading to do this just apply yourself and try it out. Use an object with unique construction if you want a challenge.
Buy a fucking lazy susan and draw food or jewelry or potted plants or something. You'll evolve fast if you always break it down into geometry.
Think of the focal length of your image in camera terms too. Wide angle closeups really exaggerate and expose the dimensions of an object for study.
Zoomed shots will make it sit perfectly to scale like an orthographic or isometric image, good for scale.
Go get it.