question about my particle system physics setting

[SlutMagic]

Hi, can anyone point me in the direction to the settings which change the particles rotation as it falls, speeds as it falls, and any suggestions how i can do the math to make the lifetime of the particle falling = about the time the particle would be parallel to the bottom of the stafflower. Heres a youtube video that shows a better explanation. thanks for any help .

https://www.youtube.com/watch?v=y0Te0pJBpKg&feature=youtu.be

[SlutMagic]

Veshter eredeti hozzászólása:

Turbulence might give you the effect you want of it going left and right but you gotta be tweaking it a bit. Also give it a bit of up if it's random, I'm not sure how it worked exactly cause I was doing no gravity physics. That's also a possibility you could try but I suggest you get it right with gravity, it's probably gonna look better.

Another possibility is to use animated wind strength of 2 or more wind effectors, one on the left side of the particles and one of the right. Aim them like 100-110 degrees for the added Z strength and just animate the strength of the wind up, down, up, down. I'm assuming you wan't to make them fall like real leaves, I didn't actually read all the comments before this lol. Forgot to mention, I haven't actually tried making falling leaves but this is the best I could come up with.

Thanks for the idea. I actually learned this right before you posted this. I added grass, added a turbulence force that moves the grass. Then I noticed my falling leaves were flying all over the place. sadly i had to turn the amount of force of it down, it made the leaves look like they were being thrown by a stationary tornado.

Is there a way to make a turbulence force only effect certain things in the same close proximity? Ideally i would want to use physics for the leaves through the particle simulation and just use the turbulence to push the grass strands around.

[SlutMagic]

FizzyElf eredeti hozzászólása:

Veshter is right you can use wind and force fields to create pushing effect that will change the way your leaves fall. In addition I did some testing last night (trying to get the ghost to flow down to the ground) and it appears that you may be able to use velocity for a fast and dirty leave fall affect.

https://steamcommunity.com/sharedfiles/filedetails/?id=2221736402
the picture doesn't show it all to well but my (very chunky) leaves moved back and forth as they fell. the controls for this are pretty limited but can get the point across.

https://steamcommunity.com/sharedfiles/filedetails/?id=2221736928
a small amount of rotation and or velocity based rotation could also help sell the look if you had a scene with a lot of wind.

Wow, thanks so much for taking the time to post what you learned. This is a great explanation. More than I could find in my online search through tutorials. I tweaked the settings but havent run the animation again. This taught me the importance of setting up low resolution quick render environments. Thanks again for the info.

[Space Fart]

I Suck And You Are Worse eredeti hozzászólása:

Veshter eredeti hozzászólása:

Turbulence might give you the effect you want of it going left and right but you gotta be tweaking it a bit. Also give it a bit of up if it's random, I'm not sure how it worked exactly cause I was doing no gravity physics. That's also a possibility you could try but I suggest you get it right with gravity, it's probably gonna look better.

Another possibility is to use animated wind strength of 2 or more wind effectors, one on the left side of the particles and one of the right. Aim them like 100-110 degrees for the added Z strength and just animate the strength of the wind up, down, up, down. I'm assuming you wan't to make them fall like real leaves, I didn't actually read all the comments before this lol. Forgot to mention, I haven't actually tried making falling leaves but this is the best I could come up with.

Thanks for the idea. I actually learned this right before you posted this. I added grass, added a turbulence force that moves the grass. Then I noticed my falling leaves were flying all over the place. sadly i had to turn the amount of force of it down, it made the leaves look like they were being thrown by a stationary tornado.

Is there a way to make a turbulence force only effect certain things in the same close proximity? Ideally i would want to use physics for the leaves through the particle simulation and just use the turbulence to push the grass strands around.

Oof unfortunately I can't help you out with that, I haven't tried it myself.

[SlutMagic]

https://www.youtube.com/watch?v=ZuyjuseZHJk&feature=youtu.be

[FizzyElf]

I Suck And You Are Worse eredeti hozzászólása:

https://www.youtube.com/watch?v=ZuyjuseZHJk&feature=youtu.be

not bad, a lot of falling pedals to render for a test video but its coming along nicely

https://steamcommunity.com/sharedfiles/filedetails/?id=2222889683

[Space Fart]

I Suck And You Are Worse eredeti hozzászólása:

https://www.youtube.com/watch?v=ZuyjuseZHJk&feature=youtu.be

Nice, but the grass moves a little weird.

@FizzyElf looks cool, Guardian!

[FizzyElf]

Veshter eredeti hozzászólása:

@FizzyElf looks cool, Guardian!

Thanks

[Space Fart]

Hey OP how did you make the grass? I tried to make some earlier and my PC almost died. I tried hair, with and without physics, then I tried animating the movement with a lattice and nothing worked for me specifically cause of the amount of grass lol. I'm curious about which way you chose.

Edit: I didn't try Children>Interpolated on the hair particles, seems to do a pretty nice job.

[SlutMagic]

I found this tutorial https://www.youtube.com/watch?v=3tE7mr8GDyY

[Space Fart]

Thanks, I'll check it out. I'll link you a blend file later for the wind effect on grass cause I managed to make something at least somewhat pleasant

[SlutMagic]

Veshter eredeti hozzászólása:

Thanks, I'll check it out. I'll link you a blend file later for the wind effect on grass cause I managed to make something at least somewhat pleasant

I'd appreciate that, I changed my force setting and the videos framerate, frame amount. and that caused the grass to stop moving. the force is linked to a empty that has a formula to move the force which i didnt pay attention to enough in the video. The new force settings make the falling petals move around cool but the scene looks silly now lol. Time to fix the grass

https://www.youtube.com/watch?v=Bg5iecbzuf0&feature=youtu.be

[Space Fart]

Oof I completely forgot to do that. I'm starting up my pc now. In the meanwhile did you try messing around with the weight of the grass and petals?

[Space Fart]

https://drive.google.com/file/d/16elgWC04RiPfUebiErQUcsaT3tnmh-xe/view?usp=sharing

Ok here I am with the blend file. For potential performance issues I set the plane's particles to 1, change it to 100 if you can run it that way but be careful cause there are interpolated children so it's like doubled or something. Now, what I found here is that the wind is weird.

You imagine the wind working in gusts, right? Well I couldn't figure out how to do that. Instead what I did was I made 2 wind effectors, used one to be weaker pretty much constant (I tried adding noise and I Can't figure out what flow does) but I animated the strength of the other one. Ignore or delete the animated cube, I was trying to get it to collide but it didn't really work.

The grass mesh has a cloth simulator on it and I painted the weight. If you wanna do that but haven't done it before, go over to weight painting on the top left where you choose object mode, edit mode, sculpt mode etc. set the weight to the desired amount and set the strength to 1. From what I can tell a weight of 1 is strong, doesn't move, a weight of 0 moves. You can either paint it entirely by hand or you can make it all 0 and then paint with strength of like for example 0.1 over it until the bottom is red and you got all the other colors in between or whatever you're aiming for. I also found it a bit hard to actually paint on the vertices of the grass that I use. Keep in mind that if the grass doesn't have enough geometry it will be "breaking" itself in weird ways. Same happens if you go from weight 1 to 0, it has to be a "gradient" I guess. Also I had the top of the grass just fall down for no reason but I guess it has to do with the cloth simulation settings. I dunno for sure. If I find out more I'll let you know.

Edit: Link used to be "restricted" cause I forgot to change it. Should be good now.