#STICK PARTICLE PARTICLE PLAYGROUND SIMULATOR#

This requires a global effort from all stakeholders consumers, regulators, industry and researchers alike. It is concluded here that tyre wear and tear is a stealthy source of microplastics in our environment, which can only be addressed effectively if awareness increases, knowledge gaps on quantities and effects are being closed, and creative technical solutions are being sought. The wear and tear also enters our food chain, but further research is needed to assess human health risks.

In air, 3–7% of the particulate matter (PM 2.5) is estimated to consist of tyre wear and tear, indicating that it may contribute to the global health burden of air pollution which has been projected by the World Health Organization (WHO) at 3 million deaths in 2012. The relative contribution of tyre wear and tear to the total global amount of plastics ending up in our oceans is estimated to be 5–10%. Emissions and pathways depend on local factors like road type or sewage systems. The emissions from car tyres (100%) are substantially higher than those of other sources of microplastics, e.g., airplane tyres (2%), artificial turf (12–50%), brake wear (8%) and road markings (5%). The estimated per capita emission ranges from 0.23 to 4.7 kg/year, with a global average of 0.81 kg/year. This paper compiles the fragmented knowledge on tyre wear and tear characteristics, amounts of particles emitted, pathways in the environment, and the possible effects on humans. I'm sure someone else will chime in with another way.Wear and tear from tyres significantly contributes to the flow of (micro-)plastics into the environment. Hopefully this is what you're looking for. If you want a gradual stop then advance however many frames you want before setting the speed effect key frame to 0 Advance 1 frame and set the speed effect to 0. Set a second key frame just before the frame where you want the particles to stop and keep the same speed. Add the speed effect to the new composite and key frame the first frame at it's default. Or another option that's a little easier, create a new composite shot and bring in the composite shot containing the particle simulator. This wouldn't work if you intend on moving the camera around though as the content of the PNG frame wouldn't be in 3D space. I don't know if the particle emitter can freeze particles in one place but you could, at the point where you want them to stop, export one frame and bring the PNG file back in at the exact point where they stop.

That way you can alter almost all properties of particles over their individual lifetime. If you want them to stop individually after they have lived for a certain amount of time, you have to adjust the speed curve in the lifetime panel (you might have to make that panel visible by clicking the 9-squares-grid icon next to the undo/redo-buttons and selecting it).You could also use a more complicated system utilizing mobile emitters and killing them off with a keyframed force, but for just freezing the effect this is probably a little bit overkill. Using linear or smooth keyframes you can also gradually make them stop. Using constant keyframes, having it at 100% and then drop to 0% will freeze the effect at that point.

#STICK PARTICLE PARTICLE PLAYGROUND SIMULATOR#

The easiest way to achieve this would be to keyframe the 'Time Scale' property under the 'General' group of the particle simulator layer. I assume you want them to stop all at once, so basically freeze the complete effect.If you want to stop particles later, you have a few other possibilities. Keyframing the speed to 0 will only affect particles that are spawned on/after that keyframe.

Stick particle particle playground