I once stood on an overpass for over an hour getting the ellements for this composite. I was on holiday and didn't have a tripod, so held the camera for all that time balanced on the bridge parapet. In the end I was never happy with the light trails I'd waited so long to get, so faked them by stroking a path with the Brush tool after setting shape dynamics to produce the taper. But that would not be the right way to go about your shape. Do as Christoph advises and use the pen tool. You might want to drag out a couple of guides to ensure a common center point. Guide can be placed outside the document limits.
Please, back to the roots. The OP's graphic doesn't have a
(common) vanishing point.
I would proceed as follows:
1. New doc, RGB, white background
2. Draw first quadrilateral by Polygonal Lasso
3. Fill Selection
4. Delete Selection
5. Repeat step 2-4 for the second quadrilateral
To the OP: one cannot fill 5 lines, but a closed contour,
as it can be created by Polygonal Lasso. A small circle
indicates, that the end points can be connected.
Best regards --Gernot Hoffmann
Here is how you can make those black lines easily with the polygonal lasso tool:
1. Start with a blank document with white background
2. From the tool bar, select Polygonal Lasso Tool
3. On your blank document, click to make the points that form the four corners of your desired shape. Press enter or click on the first point to close your selection.
4. From the tool bar on the side, select Paint Bucket Tool
5. In the lower left corner of the tool bar, click on the colored box. Choose the color black from color picker.
6. Now click once in your rectangular selection, she shape is filled with black.
Repeat all the steps if necessary to make more black lines. This is just one of the many ways to achieve the same result. Hope this helps!
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