If you change the dimensions of a sphere primitive the collision shape does not change along with it.
Yeah except these are primitives you add with edit.js.
And worse, there is no ‘regenerate physics shape’ button, command, thing.
We only support sphere collision shapes, even for ellipsoids… Basically ellipsoids are a much more complex physics shapes, the types of simple formulas for collisions that are possible with a sphere are not possible with a generalize ellipsoid.
If you really need an object that is an ellipsoid, you can make a convex hull mesh in your favorite mesh editing tool, and use that mode for collision shape.
scroll down to ellipsoids.