You have overlooked the necessary components of 3D rendering....that ball is not modelling the surface properties of the moon in any way. And the sun is not emitting enough light and if they apply directional light as opposed to point light....
It's complexity that has been overlooked...your model is broken and simple. No matter your intentions, this is a bad....bad...example.
Download Blender....spend 10 hours learning some basics...and come back ..
Obviously looking at it from different angles is how you see full, 3/4, 1/2, and 1/4 reflections on a sphere. This should inform your perspective of how you see the moon at different positions in it's revolution around the earth. Not sure why the Earth's rotation or your position relative to the equator would have anything to do with it.
Sorry, but your model is fundamentally wrong.
You have overlooked the necessary components of 3D rendering....that ball is not modelling the surface properties of the moon in any way. And the sun is not emitting enough light and if they apply directional light as opposed to point light....
It's complexity that has been overlooked...your model is broken and simple. No matter your intentions, this is a bad....bad...example.
Download Blender....spend 10 hours learning some basics...and come back ..
Then clearly you can provide an image that gives us a crescent shaped lighting on a sphere.
https://www.google.com/search?q=shpere+rendering&tbm=isch
Take your time. Any image will do.
Here you go. https://imgur.com/a/4Nx5OId
Obviously looking at it from different angles is how you see full, 3/4, 1/2, and 1/4 reflections on a sphere. This should inform your perspective of how you see the moon at different positions in it's revolution around the earth. Not sure why the Earth's rotation or your position relative to the equator would have anything to do with it.