I'm in the process of preparing some custom brushes for people. So I'thou writing this as a quick guide I can point to.

Clip Studio Paint brush files have the file extension .sut (meaning "sub tool", which is what "brushes" are called in CSP).

An case of a sub tool file.

How to install brushes

You ordinarily download multiple brushes in a pack, so y'all'll want to install multiple of them at once.

The fastest way to install multiple brushes is to select them in your file managing director, and drag them into Clip Studio Paint's [Sub Tool] palette.

Drag and drop subtool files from File Explorer into Clip Studio Paint
  1. Brand sure your files are visible in your file manager
  2. Make sure Clip Studio Paint is open
  3. Select the brush/sub tool files.
  4. Drag them into the [Sub Tool] palette inside Clip Studio Paint

There is likewise an [Import sub tool…] context menu item but that simply allows you lot to import files one at a time.

Brushes from Prune Studio Assets

Annotation that this can too apply to sub tool materials y'all get from the Clip Studio Assets site. These get added to your Materials library rather than downloaded equally files.

In this case, you need to browse your Materials library to find the brushes/sub tools you downloaded. Then you simply do the aforementioned steps mentioned above, except they'll come from the [Materials] window instead of the operating organisation file manager.

  1. Go to Window > Fabric > Textile [Download]. This should open a new Cloth window and the "Download" material folder.
  2. In that binder, expect for the brushes yous downloaded from Clip Studio Assets.
  3. Select them.
  4. Drag the brushes to your sub tool list.

If you can't find Cloth [Download] simply choose any other fabric window in the listing. You can navigate to the "Download" Material folder in the list of folders on the left of whatsoever Material folder.

For more than info on how downloaded materials from the Clip Studio Assets folio works, cheque out their How-to-Use folio: https://assets.clip-studio.com/en-us/help#how-to-use

Brush packs for Clip Studio Paint for iOS

The iOS Files app (since iOS xiii) has the ability to unzip files and better manage files contained of the apps they came from.

Look for the file y'all downloaded, and then tap on information technology. iOS volition unzip the file in that binder.

Tapping the zip file in the iOS Files app volition unzip information technology in that folder. You lot can then follow the normal steps listed above.

You tin apply iPadOS Split View or Slide Over to elevate the files from the Files app to the Clip Studio Pigment app.

Drag and driblet subtool files from the Files app to Clip Studio Paint on iPadOS

For older versions of iOS, you need to be able to extract files using a dissimilar app, or a figurer.

If the brushes you download are non inside an archive file, sub tool files tin can be imported via drag-and-drop from the apps of your online storage services like Google Drive and Dropbox. The same steps listed above employ.

If this fails, you tin try to motion those files locally onto your iPad starting time, and and then drag the files from at that place using the Files App as described above.

If you have a lot of brushes to import and use, yous may desire to read up on some Brush Management Tips: https://gumroad.com/pharan/p/castor-management-tips-for-clip-studio-paint