>>5966243on cgpeers it's called "Krenz cushart Perspective course". to my knowledge
if you do not have cgpeers, this guy on youtube posts videos of him doing some of the assignments from the lectures.
https://www.youtube.com/channel/UCoY-XTypQi0LTpsp9zMgrxgYou can also see this public lecture here from krenz's youtube channel:
https://www.youtube.com/watch?v=kbKqIJcIUCw where there are english subs. Around 56:53 he goes over how he builds form from cross-section, 1:41:00 discusses building poses from side views into perspective. The public lecture from krenz was incredibly helpful to me if you haven't seen it already, including the color part of the video which is in the latter half.
>>5966283if you can't see what he is saying based on the pictures then i dont really know what to say. take a minute to look over what is being shown. if you want something more in depth you can look at krenz's public lecture that has eng subs for more clarification at the time stamps i already listed. a lot of this stuff is a reiteration from scott robertson's how to draw, but i still found it helpful despite this. the how to draw book can be esoteric and boring to grind anyway. it is easier to see it more condensed in the lecture or as a refresher for those who have already gone through the book.