Could you help me with this problem? I suspect it's very simple but I'm a beginner.
I need to create a continuous shape out of lines 15 pixels thick, and then cut it out. I've tried the line tool, using the shift key to add to endpoints, but then the corners do not end up exactly. I've also tried the path key on the pen tool, but this always closes the shape for me, which is not what I want. The shape IS the line.
Use the Pen tool to draw your line as a path (not a shape). Make a new alpha channel, choose a hard 15 pixel Brush tool, and press Enter. This will stroke the alpha channel, which you can now load as a selection for further use.
Note that it will not remain "live", so you will have to repeat if you edit your path.