create 3D wood cube from single cross section image and able to cut the cube and see inside

I have one image of the cross-section of the wood, and stretch it, make it into a 3D game object. this way if I want to cut it, the "wood age rings" still show base on how it was cut.

I tried texture3D, array2dTexture, height map, but they are all hollow inside, only work on the surface. I need it to be a solid gameobject. not sure if this can be done in texure3d, or if using compute shader or GL or geometry shader?

https://gurmeet.net/Images/puzzles/cube_cutting_small_transparent.gif