As a Roblox developer, I’d like to make a Trail effect adapt to the velocity of it’s both attachments, and once adapted - to stop emitting the trail completely. I’d also like to adjust how long it would take for it to adapt.
This would be very helpful in cases when a player jumps from a solid environment to a moving object, e.g. jumping on a train. Usually if we use a trail on a moving object, the trail would be constantly emitting itself due to it depending on the world only. That may be desired in some cases, but if we would like a sword to emit a trail on slashes only, the trail would be highly deformed in the case of the train example from above. It could also help in situations when a player jumps from a high place and we don’t want the trail emitting all the way down, but also other velocity related scenarios.
If Roblox was to add such functionality, we would have better control over how the Trail behaves in different-speed environments.