Yeap give a try with 512. 896*is damn too strange. On the other hand video memory store usually textures, and most of he time 512*is enough. Hoi3*may use less than 256…
OffscreenRenderingMode variants are indeed : fbo, pbuffer and backbuffer. There is no case problem involved in wine registry, afaik.
It is maybe related to nvidia drivers on quite new hardware.
thanks again
had already tried 512
there is a wine bug already reported and i have added my terminal printout to that - so hopefully someone will sort it eventually
doc