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I Teach Creatives
LESSON NOTES
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We will break down how to divide planes into odd numbers like thirds, fifths, and sevenths. You will learn the exact diagonal steps to find these points on any surface. This works for floors, walls, or ceilings in any perspective. We will also look at when these methods get too complex. When that happens, you will learn to switch to measuring lines and special vanishing points. Finally, you will see how to take these exact techniques and apply them to your freehand drawing. This helps you divide planes by eye with real confidence.
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odd-divisions.mp4
223 MB
odd-divisions-transcript-english.txt
5 kB
odd-divisions-transcript-spanish.txt
6 kB
odd-divisions-captions-english.srt
8 kB
odd-divisions-captions-spanish.srt
9 kB
COMMENTS![]()
![Marshall Vandruff]()
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![Dermot]()
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![Marshall Vandruff]()
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Learn how to divide planes in perspective into odd numbers using simple diagonals. Then practice these techniques freehand to build your confidence.
Played a bit more, becoming a bit meditative and decided the freehand was just a sketch to explore. It's never perfect. This could be a nice way to design stained glass windows. 🎶Three little birds.
@Marshall Vandruff
I understand the easier method for divisions of 7th's and upward
would be to use a mearuring line and Special VP.
That said can you explain the method below as demonstrated in the video,
The "X" Diagonal lines results in 3 Divisional intersections on each line.
I can see how the intersections are created but would appreciate
an explanation of your reasoning as you drew it.
•
18d
Dermot,
I was not reasoning as I drew seven divisions with diagonals. I was following directions.
Reasoning requires a chain of inferences. Following directions is "turn right, turn left, stop..."
If you care enough to seek reasons, take it on:
1) Watch my demo slowly.
2) See if you can explain an order of lines that (here's the big deal) a student can use and remember!
I could not. I could put it into words, but to get an idea of the end result, consider the "Directions to Bolsover Street" in Harold Pinter's play NO MAN'S LAND linked below.
If you care enough, give it a try. I changed strategies at that point for this reason.
You know I don’t know anything and will confuse sometimes, but I think I had the same question last week and tried to solve it. Maybe it helps - maybe not :D
Good luck!
At 4:12 minutes into the video.
12 intersections are highlighted.
6 are used to identify and draw in the vertical divisions.
The same 6 are used draw in the Horizontal divisions.
What is the purpose of the other 6 red dot intersections?
They are used to find the devision lines for the 7 segments. If you look in the first quarter divided by the green line you can see that from its base there is a diagonal blue line going up, though the reference point you circled and up to the point he uses for the first division of the 7 segments.
When Marshall is constructing you can see that fist he gets the second mark from the left by marking it where the halfway line for the diagonal half devision meets the halfway line for the diagonal quarter devision. he then draws a blue diagonal through that. where this blue line hits the diagonal devision for the whole box is where he places his first mark to divide it into 7. If you follow the blue lines through each section you will see that each of them uses one of the circled marks to find its angle and the segment line reference point also sits on that blue line.
If you go back a few seconds (picture attached) you can see where he has both reference marks on the grid. I don't actually know why it works. Amazingly @Sandra Süsser figured it out on her own, so maybe she knows the mathematical secret to this witchcraft.
I respect parents who don't play favorites, because I certainly can't hide mine. Odd divisions are way better than even ones. just don't tell them that
wow I did not know you could do this. I mostly done everything freehand and I always knew it was off for one reason or another.
