[Closed] intersectRay issues

First off, I should note that I’m aware that what I am doing can easily be done without scripting, and the PRT Volume, available in the eval version of Krakatoa. However, I’m just having a bit of fun here, while learning some basic MAXScripting.

Ok, so I’ve created this code, which is running in a PFlow Birth Script. To my understanding, this code should by creating particles only where it is inside the volume (Said volume is a sphere, converted to a Mesh.). Instead, all positions in the grid evaluate to undefined, and I get a full grid of particles, as seen below.

on ChannelsUsed pCont do
(
	 pCont.useTime = true
	 pCont.useAge = true
	 pCont.usePosition = true
)

on Init pCont do 
(
	--space between voxels
	global VOXSPACING = 6

	--use a box as bounds for voxels
	global getBounds = nodeGetBoundingBox $voxCage (matrix3 1)
	global cageSize = (getBounds[2] - getBounds[1]) / VOXSPACING
)

on Proceed pCont do 
(
	t1 = pCont.getTimeStart() as float
	
	if t1 < 0 do --spawn before frame 0
	(
		--step through the grid of voxel positions
		for x in 0 to cageSize[1] as integer do (
		 for y in 0 to cageSize[2] as integer do (
		  for z in 0 to cageSize[3] as integer do
		  (
			  --test a ray from the current vox position to the sphere center
			  global testRay = intersectRay $sphere01 (ray [x, y, z] $sphere01.pos)

			  --if inside mesh create particle at position
			  if testRay == undefined do
			  (
				pCont.AddParticle()
				pCont.particleIndex = pCont.NumParticles()
				pCont.particleAge = 0
				pCont.particlePosition = getBounds[1] + [x, y, z] * VOXSPACING
			  ) 
		  )
		 )
		) --for x
	)
)

on Release pCont do ( )

How can this be? If a ray is shooting from the outside of the mesh, to it’s center, it should hit the the mesh, and test true. If the ray originates from inside, it should hit a backside face, and test undefined. And it doesn’t seem to matter if the geometry is a mesh or poly. Any help would be most appreciated. Thanks for reading.