shader not found in radiant 1.5 quake 4

[APM]

hello,

i find radiant a comfortable and easy editor to use due to free mouselook but im having a problem using the latest version to map for quake 4.

on loading a map i mainly get shader not found applied and have been told this is due to materials and i would need a pack of clean materials to resolve this?

but i dont know where i can find one.

surely someone else must have had this problem before but after searching im still quite stuck

please let me know if you can give me any advice.
many thanks.

[obsidian]

I don't think GtkRadiant reads inside PK4 files for Quake 4, so you need to extract the material files.

It's been a while, so I may be talking nonsense.