ZBrush Tiling Tools

What you get is a Zbrush Ztool that allows to save time on sculpting tiling textures in conjunction with the WrapMode setting. It comes with a subtool to frame tile perfectly on the canvas by pressing F. It uses a texture that you can set to mask out the range beyond the tile. Please note that you can adjust the texture masking under Texture Map > Transparency or you can just turn the texture off.

The artist has included a macro that duplicates and offsets extra subtools automatically "to make sure that any extra subtools you add to the tool will tile properly when baked to a texture."

You can learn more and get the pack for $3 here.