In Bryce (Bryce 7 and earlier), it is possible to save and open Bryce presets. Many add-on products for use in Bryce should be imported into the relevant Library in Bryce before they can be used. Presets in Bryce can be saved in the following formats:
BRYCE OBJECT PRESETS (.obp)
https://helpdaz.zendesk.com/entries/124773-importing-bryce-object-presets-obp
BRYCE MATERIAL PRESETS (.mat)
https://helpdaz.zendesk.com/entries/22422790-How-to-Import-and-Save-a-Bryce-Material-Preset
BRYCE SKY PRESETS (.bsk)
BRYCE SCENES (.br7)