(MAYBE FULLY LOST)
3D Brush is a lost iOS application, where you can draw in augmented reality, various drawings, using unusual 3d paints. The app disappeared from the App Store around the summer of 2021. And there are no IPA files to download anywhere. There was also the possibility to take photos, and record videos. You could subscribe to unlock additional colors, and features. (as far as i remember, because i used this app) You could also create your own fireworks, by swiping your finger.
The creator of this app is: (Ilya Rimchikov)
Official site of this app: https://3dbrush.com/ (the logo of App Store is not currently displayed on the site, and the video does not play)
https://web.archive.org/web/20190328032757/https://3dbrush.com/ (everything works here)
You can also can view the testing, of this app:
https://www.youtube.com/watch?v=xjGfNJTurrs, https://www.youtube.com/watch?v=3YhAN6cV8Gs
More info about this app:
https://arcritic.com/2948/draw-using-3d-lines-with-photorealistic-textures-in-augmented-reality/
More photos from this app: https://justuseapp.com/en/app/1286537390/3dbrush-augmented-reality/
