Mastery
Retest a recurring proportion error
Whenthe same size distortion appears again
Investigate one repeating height-to-width error with a baseline and a later retest.
- Steps
- Keep a baseline drawing. Note its object and seat; compare its ratio with life: too tall, close or too wide.
- Choose a correction: mark top, bottom and width before the outline. Use it in your next two normal drawings.
- Redraw the first object from the same seat at a similar scale. Compare that ratio again; keep or change the correction.
Start tiny
Label one ratio that looks too tall or wide.
When it slips
If the original view cannot be recreated, make a new baseline; do not call unlike views an accuracy test.
Evidence grade CPractitioner method or editorial idea
David DeRoche, Drawing is Seeing (2022), Chapter 4: Training Your Eye. Read the source ↗ — documented comparative measurement. The diagnosis, two later applications and baseline retest are an editorial feedback loop, not a tested protocol.
Mastery: Inspect your work, apply a specific correction in later practice and check whether it helped.
