Axis-aligned clip box (section / crop box): geometry is kept only where it
lies INSIDE all six box planes; fragments outside the box are discarded by the
shader (real geometry cut, unlike bounding-box element isolation). Coordinates
are in the same world space the shader sees as input.worldPos — i.e. the
viewer space the camera/section planes use. Independent of sectionPlane; both
can be active at once.
Axis-aligned clip box (section / crop box): geometry is kept only where it lies INSIDE all six box planes; fragments outside the box are discarded by the shader (real geometry cut, unlike bounding-box element isolation). Coordinates are in the same world space the shader sees as
input.worldPos— i.e. the viewer space the camera/section planes use. Independent ofsectionPlane; both can be active at once.