250 Cylinder Challenge

10:21 AM, Monday January 3rd 2022

250 Cylinders Challenge - DCP - Album on Imgur

Direct Link: https://i.imgur.com/yNvkZTo.jpg

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Kept you waiting, uh?

After some months since my last homework submission (I took a break from drawabox and focused more on other kind of studies), I finally finished the 250 Cylinders challenge. It was though, and I messed up, but it's finished.

2 users agree
12:24 PM, Monday January 3rd 2022

Hello DCP,

I'll be having a look at your submission today.

Looking at your normal cylinders, I see a lot of good, the degree changes are visible and the ellipses are drawn through twice. It seems you were a bit too careful though, and some your ellipses lack confidence and end up a bit wobbly, this is especially visible in larger ellipses (89, 39 and 40 for example). Be mindful of that for your next attempts, confidence over accuracy is the motto of this course. I can see that you tried to vary the orientations, but it seems you could have gone further by having cylinders with overlapping ellipses (seen from the front), as shown in this image https://cdn.discordapp.com/attachments/365180330103013388/924972804640755753/image0_.jpg

The foreshortening and sizes are a bit too similar, and I believe you could attempt more extreme foreshortening. There is a relationship between ellipse degree change and size, the more extreme the foreshortening, the larger the degree change will be, which I don't think I saw during your attempts, but that's fine. Overall, it is a nice job and I can see that you put in the effort, practice and care into it.

Moving on to your boxed cylinders, I can also see that you put in the care and practice into doing them. Unfortunately, it seems there are specific issues that need to be addressed. As your submission stands, it seems that you experimented with different orientations and foreshortening (although some of them have too little foreshortening and almost seem like they have parallel convergences, like 239 and 230). However, there are critical steps in the verification process that you forgot to do. All of your inside cylinders show little degree change and foreshortening, which is not consistent with the foreshortening in your boxes. As shown here https://d15v304a6xpq4b.cloudfront.net/lesson_images/88b497e2.jpg, the sides of the cylinder should converge to the VP of the associated edges in the boxes, same goes for the minor axes. From your different attempts, I do not see extension lines for the minor axes and the cylinders, which voids the method. The cylinder is a tool to verify if your boxes actually have square sides, and how you manipulated the inside cylinders doesn't help in actually verifying it. There seems to be not a lot of variation as well in the dimensions of the boxes. You can achieve square sides with any arbitrary Y, the more difference there is in the different lengths of the Y, the more extreme the associated foreshortening will be in order to achieve opposite square faces. Therefore, I believe some more practice will benefit you. I'll explain them in the revisions tab.

Next Steps:

I would like you to do:

  1. 10 cylinders around an arbitrary minor axis, trying to focus on confidence and larger ellipses. You can implement the foreshortening-degree change relationship if you want, as well as try the more front-facing orientations.

  2. 25 boxed cylinders, taking specific care in using the line extensions for the sides of the cylinders and the minor axes. This is crucial in ensuring that your cylinders faces are on the same plane as the faces of the box around it, and that you can check if the box faces are square. You can also try for longer boxes and more variation in sizes and initial Ys, as explained above.

When finished, reply to this critique with your revisions.
12:23 PM, Saturday January 15th 2022
edited at 12:23 PM, Jan 15th 2022

Hello! Here are the corrections https://imgur.com/a/zIPWB7o

I tried to follow the guides you gave me (and I messed up with some boxes and cylinders, I'm aware of that), but in any case, tell me if there's something else I should be aware of. Thanks again!

edited at 12:23 PM, Jan 15th 2022
2:19 PM, Thursday January 20th 2022

I can see that you have applied the guides nicely, and it's expected to make mistakes during it. In any case, the revisions you sent show that you have acquired the understanding of the concepts and have developed better skills in estimating proportions, some of your cylinders in boxes being really nice. You'll definitely have more time to practice them during the later lessons and warmups, of course. But, for now, I don't see any reason to hold you back any longer from going into L6. I wish you the best of luck there, as these last lessons will truly put your skills to the test :)

Next Steps:

Head on to L6. Good luck

This community member feels the lesson should be marked as complete, and 2 others agree. The student has earned their completion badge for this lesson and should feel confident in moving onto the next lesson.
5:53 PM, Thursday January 20th 2022

Time to move on, then. Thanks again for the feedback!

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