i hope this is the right part of the forum to ask for help. i've been been going through loomis's 'Fun With a Pencil' and i've found it extremely helpful in how to build figures, but now i've gotten to the perspective part of the book and i'm struggling with this part as it seems very light on explanation compared to the previous sections. in particular, im struggling with page 100, where he begins to show the figure in perpective with form. he has a large cylinder representing a figure in one point perspective but i cannot figure how exactly he builds the form of it. like the ellipses and how they narrow as they get closer to horizon. i don't get how he establishes the depth to make this exact. the figure itself in perspective looks much more difficult. im not sure where to even begin with that.
i have some ideas based on other perspective stuff i've read, but i don't see how he expects me to build it on my own if this were the first book i were to ever have read on drawing (since i think thats what its goal was). but i don't know, maybe im just complaining because im frustrated. i was making a lot of progress with this book but now it's come to a halt.
any help would be very appreciated