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12:54 AM, Wednesday December 29th 2021

Firstly, this is not easy. You are training your brain to be able to imagine how things interact in 3d space.

The objects can be interpreted in different ways but mainly in which object is in front of another and this will dictate which object is being cut into and which is doing the cutting.

In the case of your second one it seems like the larger box could be engulfing the smaller one. When starting it would be best to start with objects which don't overlap as much as these ones day. i have linked my very rough interpretation of the forms here.

https://imgur.com/a/KuxJt9H

In general when I did this lesson. I tended to follow an edge into the other object and stop when the edge intersected the plane it was approaching. This requires visualisation to decide if it is convincing. I would then try and imagine the edge created by the planes intersecting and follow that. Continue until the whole intersection is outlined.

2:00 AM, Wednesday December 29th 2021

objects can be interpreted in different way

yeah thats one thing thats also difficult i get lost and it seems like theres so many ways to intersect these forms especially when theyre heavily overlapped. i wanted to do boxes that overlapped a lot more cause i thought it would be decent practice? but its pretty hard. If i wanted the smaller box to intersect the bigger one would that be possible? or does that mess up perspective

1:24 PM, Wednesday December 29th 2021

Better to start off with smaller overlaps as these will be more obvious how they intersect.

In general, at the start you have to make a choice about what is in front of what. After that you have to draw your intersection consistent with that choice. The size of the boxes is not particularly important.

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Sketching: The Basics

Sketching: The Basics

A lot of folks have heard about Scott Robertson's "How to Draw" - it's basically a classic at this point, and deservedly so. It's also a book that a lot of people struggle with, for the simple reason that they expect it to be a manual or a lesson plan explaining, well... how to draw. It's a reasonable assumption, but I've found that book to be more of a reference book - like an encyclopedia for perspective problems, more useful to people who already have a good basis in perspective.

Sketching: The Basics is a far better choice for beginners. It's more digestible, and while it introduces a lot of similar concepts, it does so in a manner more suited to those earlier in their studies.

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