Whenever I fly a mission in Red Baron II - as soon as Combat starts part of the aircaft and ground graphis blur into a mishmas of rainbow effect of colours and almost opaque then it crashes
I am using windows 10 and NVIDIA optimus using glide
Any help greatfully accepted

It is almost a glide issue as the sim works fine in DDraw!

nglide can give problems if not using stock terrain. I run RB on windows 10 using dgVoodoo 1.5 beta2 with no problems. If you like to give it a try, here is a link https://1drv.ms/u/s!Aiqc45g1rn3MhDrhTWeK9JvrGTrq just drop the glide2x.dll into your RB folder. Make sure you rename or remove your nglide files.

Salute!