SDK - software development kit - source code of the program GR2EditorViewer.
if you about gr2-viewer of radgame – I have this thing in bulk too:
"NF_Boat_1" (added on Roster in The Wolves of Steel) I gave for example only. Gap, you personally can easily check this guess on this sh5unit even without going into the shaders - GR2EditorViewer-> Export obj-> in 3DsMax or other 3deditor - simply increase the model by x2 (enough) or more times -> GR2EditorViewer -> Import mesh back to GR2 and dynamic shadows appear on “NF_Boat_1”:
