Without using a part and raycast,
is there a way, I can have a triangle in 3d space
aligned or not aligned with any particular axis
then also have a vector, that may or may not pass through the triangle
is there a way to determine if it passes though the triangle, and if it does, where the point of intersection with the triangle plane is?
if it makes things easier, the vector will be along the Y axis, but the triangle could be any sort of orientation