Updated : 2021
Learn how to create a quick polka dot brushes set for Adobe Photoshop tutorial ().
Polka dot brushes and designs can be created in Photoshop (and of course other apps).
You can use the Photoshop guides and new guide layout to create cells for polka dot spots in Photoshop.
The spots for the polka dot brush can be added to the cells uniformly or in random sizes. You can also change the color of the polka dot brush spots for each cell as required. Quickest way is perhaps using custom shapes
Create a document sized 600 x 600 or 1000 x 1000 etc.
View menu and snap ON
View menu and snap to guides ON
View menu and new guide layout
Columns 6 and rows 6 and both ON
Go to the ellipse tool and create a circle (as a shape layer) that snaps to the guides in the first cell
Alt / option and duplicate that circle and place in the third cell in the first row and then duplicate and add to the 5th cell in the first row
Duplicate and go to the next row and add the circle to the 2nd cell (using the snap so it is in the center of the cell)
Repeat with the 4th cell and then move to the third row and place in the first cell etc
You can change the color of the individual cell circles for the polka dot brushes in Photoshop.
Click the circle shape
Window menu and properties
Change the fill color to different colors such as a pastel theme
Change all the different cells
You can now use adjustment layers to re-color all the designs in one go or use adjustments via the image menu. You can also use the adjustment black and white to change the color to different black and whites for use with the brushes define
Edit menu (now you have your brush stroke design)
Define brush
You can now apply the polka dot brushes via the brush tool as well as many other tools via the brushes panel.
Select a brush tool in the Photoshop toolbar
Go to the brushes dropdown
Select a polka dot brush
Set the color for the polka dot brush via the Photoshop toolbar (such as pink in the right image)
Set the size
Go to the brush panel and set other settings such as spacing and scatter and hue dynamics
Apply the brush strokes
You can also export the artwork as a PNG file and then use the polka dot brushes in other applications such as Clip Studio Paint and others. You can change the color of the polka dot brushes in countless ways as well as combine the brush strokes with effects such as camera raw filter and also adjustment layers such as hue / saturation and also invert and photo filter and many others (sadly the HDR toning is not an adjustment layer)
Select a polka dot brush
Set the color
Go to the brush panel
Set the spacing
Set hue dynamics
Set scattering etc
Go to the far left top of Photoshop to the tool preset picker
Right side menu and create a new preset
You now have an instant polka dot brush that can be selected in seconds and used countless times in your projects
You can also make different types of polka dot brushes such as smaller polka dots such there is a bigger gap between the dots, perhaps polka dots with two dots or perhaps polka dots made of different shapes such as squares or triangles or more fun designs.
You can also take the polka dot designs and turn them into a polka dot pattern by using the edit menu and define pattern command. On your right, you can see an example of the polka dots saved as a pattern via the edit menu define pattern and you can see the color of the artwork (you can also use the colorful designs as a layer as well and not as a brush stroke).
Or by using smaller dots or using the polka dot brushes with different colors of brush stroke (such as white on a black background). Adjustment layers can also be used to manipulate the color and brightness of the polka dot brush design or image. The polka dot brushes spots can be large or small. You can create a large document with many cells for the polka dots but the best approach is to use even cell numbers such as 6 x 6.
Once you have created the basic polka dot brushes then you can define them via the edit menu and define brush. The polka dot brush is then added to the Photoshop brushes panel. The polka dot brushes are only colored by the current foreground. If you wish to use the polka dot brush as an image or as a source for a colorful pattern, use the define pattern command instead of define brush. You can then fill any document with the polka dot brushes in Photoshop (as well as export the artwork for use in Affinity Photo etc).