Starting with your form intersections, your work here is looking good - you've done a great job of thinking through the intersection lines and defining the manner in which these forms relate to one another in 3D space. Similarly, your work on the cylinders in boxes is coming along well, with the line extensions applied correctly so as to continue identifying where your approach can be adjusted to continue further improving as you continue to work through this exercise.

Continuing onto your vehicle constructions, I'll start by saying that as a whole, you've demonstrated clear and strong spatial skills throughout your work here - however, what I'm going to address in this critique is going to be focused around the fact that what we want to confirm through the assigned work here is not specifically that your spatial reasoning skills are solid, but that you're demonstrating a clear understanding of how the constructional drawing exercises we employ here can be used to continue improving upon the spatial reasoning skills you currently have. This means that any situations where we might use our existing spatial reasoning skills to skip steps and speed up the process works against this goal. That's the main thing we're going to address here.

To be clear though, you are indeed demonstrating really strong spatial reasoning skills, and clearly show that the work you've done throughout this course has come together to improve your drawing skills as a whole. I just want to make sure that you know how to keep that going on your own.

Now one thing I find especially interesting is that you demonstrated a great deal of patience and care when approaching the "form intersection vehicles" - you were very particular about how the structures were built up, employed each step with care, and didn't skip anything over. Ironically enough this exercise wasn't intended to include subdivision/plotting out perspective lines and such. All this exercise requested was that you do the form intersections exercise, but with your forms arranged in such a way that they match the layout of vehicle. The only difference from the normal form intersections would be that the positioning of the forms would not be random.

The techniques you applied as fastidiously as you did here were expected to be applied in that manner in your later vehicle constructions, and it's there where they're needed. Now there's definitely variety in terms of how you approached these constructions - for example, this jeep was definitely more fastidious (there were some skipped steps in terms of laying out the grill along the front, where you skipped the use of subdivision to ensure an even spacing, and the windshield area was also built up more arbitrarily from observation and relying on your existing spatial reasoning skills, but all in all this was definitely one of your more thorough constructions), whereas this one was by and large drawn from observation, resulting in a notable lack of precision.

Continuing on, I noticed that you do appear to have missed these instructions, which state that you should be using the same kind of pen throughout all of your linework, and avoid switching to a thicker pen to go back over your lines. Looking at your constructions it definitely appears that this is exactly what you ended up doing, using a fainter pen for your construction lines, then cleaning it up with a fineliner as we can see here.

Now, I can say with confidence that you know what you're doing when it comes to drawing, but I do want to see one more drawing from you before I can mark this lesson as complete. For this drawing, I'd like you to effectively take what you were doing for the "form intersection vehicles" (that is, taking the approach you employed there), and then simply continue to build upon it, step by step, to build out the remainder of your vehicle's constructional details.

I'd also like to see the proportional studies you did for these - it seems you left yours out of this submission.

I normally avoid sharing other students' work as my intention is never to create an expectation of the level of quality, but I have found that for those who perhaps don't quite push themselves as far as they could with this last lesson, there's a lot to be gained by looking at this work from veedraws - not just because she approaches it with a thoroughness that is plainly visible to anyone, but also because of the timesheet she included, demonstrating clearly just how time consuming the work in this lesson can be. Based on what you've demonstrated here, I think you are just as capable as she is - given enough time.

So! You're very close to completing the course - all we need is one more drawing.