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Particle spawned before play

I always need wait to spawn/born for example smoke particles to full range on whole scene. But I would like to have smoke on whole scene exactly after hit a play button. What should I do?


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asked Jan 16 '15 at 02:27 PM in Rendering

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2 answers: sort voted first

I had the same issue, in UE 4.18, and as @xlar8or pointed out; the "Warm Up Time", in cascade, does not work for GPU particles :(

My workaround is to set the CustomTimeDilation, of the particle system, to a very high value (100) in the BeginPlay of the level blueprint. This makes the particle system play 100 times the regular speed. After a short delay, of 0.025 seconds, I restore the CustomTimeDilation to 1.0. Depending on your game, such as the size of your particle system and whether you use e.g. GlobalTimeDilation, you may want to set different values for the CustomTimeDilation and the delay before restoring it back to 1.0.

P.S. I know this answer comes a bit late, but when searching I found this. If it helps just one person it's worth the post :)

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answered Dec 06 '17 at 06:31 PM

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avatar image SleepyRatSquad Nov 19 '18 at 04:24 AM

@amcofi - Thank you! Your solution worked great!

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Hey thobias -

In Cascade, Click in the black area beside your module list and then look in the Details panel at your whole system settings for that particle system and you should see a Warm Up Time, adjust the time as necessary to have your system start where you desire.

Thank You

Eric Ketchum

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answered Jan 16 '15 at 08:50 PM

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Lovecraft_K ♦♦ STAFF
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avatar image thobias Jan 19 '15 at 11:00 AM

Thank you, Eric, that is exactly what I need!

avatar image xlar8or Nov 07 '16 at 07:59 PM

This only works for CPU particles, at least in 4.12 :(

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