Ok, well I did a test earlier to see the viability of creating 'presets' of my textures, and I took the moss/twigs from Ultimate Woodland as an example. I made this into a material with all the required bump, diffuse and ambient settings etc., exported as a single mat file that you could then simply import, but the file size (uncompressed) of that one file was 3.8Mb as opposed to about 500k!!! - this would make for very large downloads of a package or genre, ie: barks, mosses etc. The only way that i can see around it, would be to knock down the resolution of the textures to about half (500px) which theoretically, would lower the individual map size to about a quarter of the above - but, detail would be lost for larger, or closer to camera rendering. I will experiment some more and let you know what could be done!

Adam Benton | www.kromekat.com