TR64OGL has various issues with S.C.A.R.S like the virtual creation of tracks/ground and effects etc. See below video
[youtube]http://www.youtube.com/watch?v=GhpeJUTxlcI[/youtube]
This is S.C.A.R.S on Glide64 showing a near perfect emulation of the game for comparison
[youtube]http://www.youtube.com/watch?v=Oh_TB7Z2QvA[/youtube]