Try to split your mats into groups, but don't load them into Bryce.

When you start a project only load the groups you need into your presets folder.

For example: If you are going to building a space ship load up your metal mat group......

Overloading your texture/mat catalogue can cause the catalogue itself to become corrupted and you'll be back to square one befoe you know it.

Available on Amazon for the Kindle E-Reader

All the Woes of a World by Jonathan Icknield aka The Bryster

And in my final hours - I would cling rather to the tattooed hand of kindness - than the unblemished hand of hate...