I want the tips of the polygons in the video files to be mapped "perfectly" to the tips of the polygons on the actual wood model I've prepared.

Creating one Slice and using dozens of subdivisions on it seems like a very tedious and inaccurate way to do this.
I'm unable to draw multiple polygons when I add a Polygon, it ends up like this which can only help in mapping the outermost tips of the polygons.

I can draw each polygon individually like this:

It seems to work, but its slow to create (I dont see key shortcut for drawing a polygon) and is it a good way performance-wise, or is there a better way to do this I'm unaware of?