justinngjw Posted June 15, 2022 Share Posted June 15, 2022 Hey there, I'm trying to do some slow-motion with my flip sim and realize that reseed particles are messing up the retime due to its nature to generate new particles every few frames. However I cannot disable reseeding because i'm siming my flip with Narrow Band. is there a way to tackle this without disabling Narrow Band or is there a way to somehow set a fix number of particles and set-id so the sim won't get mess up when im trying to retime it? Quote Link to comment Share on other sites More sharing options...
tamagochy Posted June 15, 2022 Share Posted June 15, 2022 Enable add id in flip solver on particles motion tab. And use id attribute with retime Quote Link to comment Share on other sites More sharing options...
justinngjw Posted June 15, 2022 Author Share Posted June 15, 2022 (edited) On 6/15/2022 at 3:57 PM, tamagochy said: Enable add id in flip solver on particles motion tab. And use id attribute with retime Expand Hey! yes I’ve did that, but the problem is because reseeding are enable, it causes the point and id to shift regularly. this problem can be fix by turning off reseeding, but narrow band doesn't allow me to disable reseeding. Edited June 16, 2022 by justinngjw a more detail reply Quote Link to comment Share on other sites More sharing options...
Benyee Posted June 16, 2022 Share Posted June 16, 2022 On 6/15/2022 at 6:43 PM, justinngjw said: yes I’ve did that, but it due to reseeding the points and it’s id still changes Expand or post your file of simple version? Quote Link to comment Share on other sites More sharing options...
justinngjw Posted June 16, 2022 Author Share Posted June 16, 2022 (edited) On 6/16/2022 at 4:32 AM, Benyee said: or post your file of simple version? Expand sure, heres the file with a flipbook. notice how the reseeding takes effect in frame 33 thank you Retime_With_Narrowband.mp4Fetching info... NarrowBand_Reseed.hipncFetching info... Edited June 16, 2022 by justinngjw Quote Link to comment Share on other sites More sharing options...
Benyee Posted June 16, 2022 Share Posted June 16, 2022 you almost got the way, just try setting "birth threshold" to 0 on flip solver NarrowBand_Reseed_fix_od.hipncFetching info... sometimes this kind of issues are knotty, generally we can adjust reseeding paramaters, some lower birth thresholds, higher death thresholds, and lower surface oversamplings, or other parameters, depends on your effect needs and also, increasing flip resolution is important for decreasing the popping effects Quote Link to comment Share on other sites More sharing options...
justinngjw Posted June 16, 2022 Author Share Posted June 16, 2022 On 6/16/2022 at 3:30 PM, Benyee said: you almost got the way, just try setting "birth threshold" to 0 on flip solver NarrowBand_Reseed_fix_od.hipncFetching info... sometimes this kind of issues are knotty, generally we can adjust reseeding paramaters, some lower birth thresholds, higher death thresholds, and lower surface oversamplings, or other parameters, depends on your effect needs and also, increasing flip resolution is important for decreasing the popping effects Expand hey, thanks for the suggestion! however it doesn't seems to work. if you look at the geometry spreadsheet, the id and ptnum are still shifting along with the frame moving forward. From the file you give, after retime, the particles are still shifting. you can see the first shifting in frame 33 I need the particle id to stay the same throughout the sim. I've tried to revisit the parameters as you suggest, but I still can't find anything affecting the reseed. Quote Link to comment Share on other sites More sharing options...
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