Hello!

That's awesome that it's been 3 years about this. And the truth is that you can see a lot of progress.

Above all, I can always mention a few things to highlight:

Lines:

Your lines look stable and without distinguishable errors in them.

Regarding line weight and shading, both well drawn and applied in place.

I like that neither looks rushed drawn.

Box construction:

• It's quite helpful if you've drawn your boxes in various orientations, so you won't be surprised when you're asked to draw them in various positions in later lessons.

• I see you practiced boxes with deep and shallow foreshortening.

While both are useful in future boxes you will want to stick more to shallow foreshortening.

This is because shallow foreshortening represents objects of common scale and not very close to the viewport, which we will draw in the next few lessons.

• You will notice that in several boxes your lines converge in pairs.

As in this image:

https://imgur.com/KSHwTwo

This is a mistake to avoid.

It usually helps to think of the relationship of each line as a set to its vanishing point.

Shown here: https://imgur.com/8PqQLE0

As you will see, the inner pair of lines will have a somewhat similar orientation, while the outer pair will vary more depending on the position of the vanishing point.

If the vanishing point is far away, the lines will be more parallel; and if it is close, the lines will converge faster due to their foreshortening.

Conclusion:

I'll leave you a minimum of homework to rectify just that odd convergence in pairs.

And take the opportunity to draw the boxes with shallow foreshortening.