[panzerkeil]

It's also not listed in the filelist.txt of the sfs extractor..
These are the only cloud files I can find:

effects/clouds/CloBoard.mat
effects/clouds/Cloud.mat
effects/clouds/Cloud4x4.mat
effects/clouds/Cloud4x4_nosort.mat
effects/clouds/DATA.cld
effects/clouds/cloboard.tga
effects/clouds/cloudata.cld
effects/clouds/clouds4x4.tga
effects/clouds/cloudsA.tga