Creating a perspective grid with a ten point divider

A quick tutorial on how to lay down a perspective grid with a ten-point divider.
 This is a Weems & Plath 10 Point Divider, usually used for nautical navigation. I think.   I wanted to show you a little trick someone mentioned in passing: you can use these to easily create arbitrarily placed vanishing points for a perspective grid.,  said. So, start with two lines that are part of the perspective grid you want to draw, the horizon line, say, and one other line.  Also draw two vertical lines.,  said. Now use the Ten Point Divider to put points equally spaced apart along one of the vertical lines.,  said. And do the same on the other vertical line.,  said. Connect the lines on both verticals and presto! You have a set of lines that seem to come from a point placed arbitrarily far away from the page.,  said. Do the same for a second vanishing point, and you have a two-point perspective grid.,  said. And... ready to place objects realistically in a space.  Usually you have to go through some length to place vanishing points far away from the page, but with the help of a ten point divider it becomes really easy.,  said.

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