8:21 PM, Sunday August 2nd 2020
Hi Gem,
is this what you are searching for...?
Once I'm done with a lesson, should I ever do these exercises again, or am I done forever?
Ha! No way. You're stuck with these things forever. For lessons 1 and 2, once you're done with a lesson, the exercises from it should be added to a pool. Every time you sit down for a drawing session, pick two or three exercises from that pool and do them for 10-15 minutes. This way you'll continue to develop those technical skills, improving your ability to draw smooth and flowing lines, to construct solid boxes, to reinforce the illusion of volume with contour lines, to wrap your head around how forms interact with each other in 3D space, and so on. These are the base level skills, but they're also the skills that will have the greatest impact on your overall ability to draw. Practicing drawing kangaroos will get you really good at kangaroos - practicing your use of the ghosting method to draw smooth, confident lines will improve everything.
...even when lessons 1 and 2 are complete, I still insist that students continue practicing those exercises regularly as warmups. This is because we never truly attain mastery over these basic skills, and with disuse they can get rusty. We need to work towards continually sharpening, and ultimately keeping them sharp.
Both quotes can be found on FAQ pages: https://drawabox.com/FAQ
By the way, I think warmups are not a prerequiste for 250 Box Challenge. From my point of view 250 box challenge is a very very long warm up on it's own. But maybe that's something which can be seen different by different persons.
Hope that helps you on your journey.
Best,
Neuromancer