Rendering:
Create a new layer in Photoshop and use the pen tool to draw a curve based on the background object.
(Remember the pen works in "Path" mode, not "Shape Tool" mode)
Then use a thinner brush, select white, and stroke the path~~ When tracing the path, remember to use the menu under the path panel and check "Simulate Pressure", so that the middle is thicker and the sides are thinner~~
In this way, an optical fiber appears (of course, if you are willing: you can also trace several paths together without independent processing)
