The WidthScale property is a
DataType/NumberSequence that scales the width of the
Trail over the course of its lifetime.
This property can range from
1. The value of the property influences the width of the trail by setting the trail’s width to the product of:
(distance between trail's attachment0 and attachment1 in studs) * (the value of WidthScale)
For example, if the trail’s attachments are 2 stud’s apart, and the value of this property is 0.5, the trail’s width will be 1 stud and the trail will be centered in between the two attachments.
If you would like to hide the trail entirely, consider setting
Trail/Enabled to false.