I’m working with Blender 2.68a and loving it but while working with a fluid simulation I have run into what I believe is a bug. The scene is fairly complex so to evaluate the problem I created a bare bones simulation. One fluid domain, one fluid inflow and one fluid outflow.
Now with that simulation I set the inflow at the top corner of the domain and set the inflow velocity to z -1. When the simulation stops baking it works just as I have seen it work in countless tutorials. Thanks for all of those great tutorials by the way. Any how the flow is nice and smooth, a solid stream.
Now when I set some keyframes on the inflow properties - it does not matter if it is the velocity settings or the enable checkbox. When a keyframe is set and the fluid simulation re-baked the flow generated by the inflow object (regardless of the mesh type or the initialization parameter) breaks. Its difficult to describe! If I’m working on a small stream, always a good idea with fluid simulations, then the stream becomes large drops that even when the velocity is set to crazy heights (tried 20 or -20) it still fails to form a stream. When dealing with large inflow objects the single stream before the keyframe is set becomes multiple smaller streams spread out, though headed in the same general direction. In general this looks terrible and is impossible for me to predict ahead of time and unfortunately not usable for my scene.
I want to make it clear that the keyframes work exactly as designed when the timeline hits the keyframe whatever the property it activates the requested change. You can see the change in the stream but again the stream is so distorted that it is not usable.
So my questions are 1) is this a bug? 2) is there a work-around? 3) am I doing something wrong?
I would greatly appreciate any input on this issue.