Unable to apply Paint to Grid

[Bren]

This is probably a trivial thing:

For testing purposes, I've created a 24x24 terrain, exploded it (which took a while to find out it was necessary), smooved it a bit here and there, and tried to apply a texture via the Paint Bucket tool, but the options in the PB tool are all greyed out....?

[Gaieus]

What exactly is greyed out there? Could you attach a screenshot?

[Bren]

Ugh, my fatigue made me overlook what I was actually looking at: it was the wrong tab! This reteaches me the valuable lesson of being well-rested...