1. Add a new document, and the size of the document will be as you like. Select Menu "Edit > Fill" to fill the background layer with one color (I use #6188a0). Then add a layer on the background layer, named object.
2. The next operation has two ways. You can choose the right method according to your own liking.
Method One: Select the Brush tool and use a 1-pixel hard stroke. Set the opacity to 100% and draw a black contour on the object layer. A hard corner of the polygon will produce the best effect, of course, the specific shape of what is entirely up to you.
Method Two: Create a path using the Pen tool. Then hold down the CTRL key and click the path on the path panel to convert the path to a selection and load it. Then go back to the Layers panel, select the object layer, select Menu "Edit > Stroke", and stroke the selection using a 1-pixel black line. Then you can delete or hide the path you just painted, because we don't need to use it anymore.
3. Hide background layer, show only object layer. Select the Marquee tool, drag and drop a selection, the 2nd step of the polygon frame selected (hint: As long as the complete box to select a polygon, a small selection of large, Photoshop will automatically be appropriate to cut). Then select the Menu "Edit > Define Brushes." In the pop-up dialog box, give the brush a name and click OK. Now you can delete or hide the object layer because we don't need it anymore. Unhide the background layer.
4. Add a new layer to the top of the layer, named path. Using the Pen tool, draw a sleek path, as shown in the figure. Note that the path does not use a sharply changing corner, otherwise it will affect the final effect.
Note: If you use the second method in step 2nd, be sure to add a path layer for this operation. Otherwise you might be able to mix two paths to affect the subsequent operation.
5. Open the Brush panel and select the Brush tip shape option. Select the brush we just created, and turn the pitch down to 10-20%, and the exact number will require you to try it out in practice. However, avoid using too high a value, otherwise it will affect the final effect.
Note: In unused operating systems and different versions of Photoshop, brush labels may be in different locations. If you are experiencing problems, please refer to the relevant guidelines and help.
6. Do not close the Brush panel and select the Dynamic Shapes option. Change the angle jitter control to "fade" and enter a numeric value in the Value input box, which controls the number of final shape spirals. A value of 100 is a relatively good default value. Do not select other options for the brush panel. When the settings are complete, close the panel.