.qc (dot qc) - the group for quake c coders of all denominations. If you make quake one mods and write code in quake c, join our group! I'll try to answer any quake c questions - please post your inquiry in the forums...
The rail trail you see here was done in quake-c. Later I'll post a code snippet in the hard_code() forum and link to it in the comments.
Rail trail quake-c example code - this is what made that trail you see...
link to hard_code() - Moddb.com