Thanks for the quick reply. I've only just installed 1.2.57. Using 1.1.92 I always got the game being projected onto a screen in a steam room as the earlier posts mentioned. I am patching the game with ReVive. So, depending on which PiPlay version I use, this is what I'm seeing:
1.1.92: projected onto a flat screen in a steam vr room
1.2.57: can't see the game at all, just the wireframe dome and a steam menu.
I must be missing something fairly obvious but I can't think what it is.
I'll edit the steam config file too, but I think that's more to do with the screen pausing. I'll try it though.
Very grateful for any more ideas, thanks
[Edit: I'm back on 1.1.92 now, and I'm still getting the wireframe dome screen. Help ]