Hi cybebe! Thanks for picking it up ๐
Just to clarify, you can't manually select a brush from a list or preview. Instead, you switch between brushes in the brush set using the assigned hotkey (Space + W).
The preview should appear after the brush set is created, so I'm curious how you created your brush set. Did you use:
- Grid Tiles (for tilesets)
- Separate Selections
- Selected Cels
Since you're using an 8x8 tileset, I'm guessing you're using the Grid Tiles method, but let me know your steps so I can try to reproduce the issue.
I also made a GIF demo showing the workflow in case it helps.

For reference, I'm using Live Brush v2.1.1 with Aseprite v1.3.16.1. Could you also let me know which version of Aseprite you're using?