Yes, this fixes the issue with the right eye!
It doesn’t seem to be the only culling problem though:
For volume rendering, we still see some issue - experimenting with a volume (grayscale fiber rendering), it starts to show as some kind of “white fog”; by interactions I can make the volume smaller so it becomes visible as a whole; but when the volume is close enough to be cut by the the near plane, the cut doesn’t seem to happen in direction of the viewer:
I guess this is a similar or related culling issue?
EDIT: how it looks when starting is depending on the spacing of the volume (only the rendering, not the size). With sufficiently small spacings (e.g. 0.05), I don’t see the “white fog” (which appeared with spacing > 0.5) but the volume gets more or less rendered (though already then, being cut int the “wrong direction”):
(we see the front of the volume - you see the bounding box in the upper left, even that is “cut” towards the back it seems).
That the bounding box is cut is something happening only in the “initial” view - if I move the volume around, the box starts to stay visible as a whole, only the volume gets wrongly culled.
EDIT2: This volume rendering behavior can actually be reproduced by my example code above - look how you can “see through” the volume when you are actually supposed to be “in it”:
