I really want to learn how to draw accurate shapes in a 3D cartesian coordinate system. What are the best resources for drawing things like cubes, cones, spheres, blocks, ellipsoids, and also hyperboloids and saddles, etc?
I do it all the time out of necessity but they still come out looking very bad, I'm hoping some resources will make it easier for me to learn to draw them well.
scott robertson to study and lear perspective laws, then you can even try drawabox course as it already has set some exercices for you to do with orientation
drawing at will a box in the direction, size and place you want in a context requires a brain fitness you're not gonna build in a month, so don't understimate it or you'll find yourself disapointed at your results
perspective knowledge is the base to not just copy perspective from references but to understand it, so you can actualy do your own things making sense