Harald JOHNSEN wrote:

A cloud is represented by multiple billboard primitives. Above a certain distance they are replaced by an impostor (one quad).
When they are near I draw all their billboards, each having its viewing angle to face the camera. It's that angle that must be locked above a certain value.

I think this is the same problem that the viewer code has when looking straight up (or straight down). It supposedly has something to do with the rotation matrix and should be solved by using quaternations.

Now, if I only knew what those are :-)


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