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I'm having an issue getting fluids to calculate if i set the stat time anything other than 0. I have a situation where the calculations (base on an object track) need to start 4 seconds in and end 32 seconds later. I've tried a number of things all of which don't net the correct results.

1) Setting start-end frame ranges - Everything still simulates from frame 0 even if i set the frame ranges where i need them. - Have TIME on the domain set to 0 and 32. was assuming that it would use the start time based on the current frame range? Guessing not.

2) Setting the start time - Frame range is left to start at 0. - Domain is set to start of 4.0 and end of 36 (to include the offset of the 4 second start). - Upon doing this it never actually simulates. Just sits on a calculating to infinity.

So my first question is is it even possible to simulate MID portion of an animation or do i need to slide everything back to start where i want the action the begin?

And secondly, does the time offset for start work currently? I've read mixed results online.

Appreciate the help!

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Not sure exactly what you want to do, but sure, it can be done.

Yes, things will start at frame 0 unless you change the Offset value in the Domain settings. You will want to set it to -(framerate times 4). So -96 or -100 I guess. By the way, the Offset value does not need being set before baking. You can change it anytime you want.

The Start value is something else. If you set it to 4, then the first 4 seconds won't show, so you won't see the beginning of the animation. It will still need to be calculated though, so there is no saving time. I don't know why it wouldn't bake at one time. I did some tests and experienced no problems.

In general, there is usually no need to change the Start value. Offset is what you need.

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  • $\begingroup$ This should be noticed If you got a longer frame and inflow object is moving, the messing thing was happened that your offset also offset the inflow behavior to later frame. This is expected, but I cannot believe Blender Team haven't found a good idea to slove this to save baking times. $\endgroup$ – Tokenyet Jul 10 at 11:20

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