Perspective drawing technique using string

Perspective drawing technique using string.

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Previously:

https://www.homemadetools.net/forum/...112#post125899
https://www.homemadetools.net/forum/...636#post159259
https://www.homemadetools.net/forum/...805#post156136
https://www.homemadetools.net/forum/...422#post127363

Perspective drawing technique using string - GIF