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12:10 AM, Tuesday February 7th 2023

https://sketchfab.com/3d-models/tetragonal-prism-showing-two-of-its-diad-axes-0aded015eb204e98b0b6aa67b9fc7089

https://sketchfab.com/3d-models/elipses-in-cube-8dd68059812e4eb295cb3274ca43ec35

https://sketchfab.com/3d-models/tetragonal-4m-8e797913a60f41edb91b1fefbe4b54b9

https://sketchfab.com/3d-models/tetragonal-4-fc9b1af8668040ebb1a4c08f314a2beb

My humble advice would be that you spend a little more time analyzing and studying these 3D models and start with simpler boxes, with a simpler perspective, get them right, feel more comfortable with them first then move on to add the cylinder. Pay more attention to the overall construction of the box first. Looking and understanding the planes of the boxes is helping me understand the cylinder too. Well, at least this has been of a great help for me :) I hope it can help you in any way too.

6:34 PM, Wednesday February 8th 2023

Thanks, didn't think of using 3D renders as visual reference.

7:14 PM, Wednesday February 8th 2023

You're welcome, it is important to force our lazy brains to understand what we are doing wrong and ponder about it, but I also think it's nice to look, study, analyze some 3D objects, somehow by doing that I noticed I started to rotate objects in my mind with much more ease. Happy studies :D

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A lot of my students use these. The last time I used them was when I was in high school, and at the time I felt that they dried out pretty quickly, though I may have simply been mishandling them. As with all pens, make sure you're capping them when they're not in use, and try not to apply too much pressure. You really only need to be touching the page, not mashing your pen into it.

In terms of line weight, the sizes are pretty weird. 08 corresponds to 0.5mm, which is what I recommend for the drawabox lessons, whereas 05 corresponds to 0.45mm, which is pretty close and can also be used.

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