03-22-2021, 10:52 AM
I don't want to start a low value debate on perspective vs orthographic projection since it doesn't really help you much towards the goal of learning to actually draw objects with volume, but Darktiste is technically correct. The 3d cubes you are using as ref to draw in that exercise seem to be using an orthographic projection camera, where parallel lines never converge to a vp in the distance. All the 3 axes don't converge to a vp. You can check this by measuring the sides of the cube; all the parallel lines should be equal to each other in length if it is an isometric projection of a true cube. Eyeballing, this appears to be the case.
In an actual perspective based drawing at least one of the axes goes towards a converging vanishing point: 1 axis in 1 point perspective; 2 axes in 2 point perspective, all 3 axes converge in 3pt.
There is nothing particularly wrong with trying to draw isometric cubes for a little bit of practice especially if you need to regularly design things in isometric for your game work, but you should probably be aware of the difference.
In an actual perspective based drawing at least one of the axes goes towards a converging vanishing point: 1 axis in 1 point perspective; 2 axes in 2 point perspective, all 3 axes converge in 3pt.
There is nothing particularly wrong with trying to draw isometric cubes for a little bit of practice especially if you need to regularly design things in isometric for your game work, but you should probably be aware of the difference.