How to Aim Offset on Mouse Cursor Position

So the player decides how long will
the animation draw the bow and this is
deciding how far the arrow will go
without spawning this arrow on release
but applying force to it…

You’ll need more than line-plane intersection for this. Consider looking into this one:

314569-screenshot-2020-09-22-163428.jpg

For example:

Essentially, you feed it direction (find rotation to cursor, for example) and the length of the anim (or how long the draw bow action is held for) sets the force. The prediction node spits out interpolated points and a hit.

It’s been years since I used it but I believe that’s what you’re after here. Hope I did not mix it up.

Do tell how it goes.