Unfortunately, for this to work from the shader you will have to manually activate the texture layering on the surface colour. Click on the [T] button to the right of the surface base colour once to activate it. Now the infiniMap shader can create an OpenGL proxy layer for that surface.
While the layer has actually been created, LightWave3D will not display the layer in the texture list until you close and re-open the texture list.
Due to a limitation imposed by LightWave 3D, the image preview is not available in the procedural texture component of infiniMap 3D when running in Modeler.
Sometimes LightWave3D doesn't register the fact that a texture value has been changed. Switching the preview resolution is one of those cases. If it happens, please refresh the preview or VPR manually.