I tried the SLPK in ArcGIS Pro and all I got was a flat imagae with no apparent height. Tried the same in ArcGIS Online and I got it working, but the functionalities in Online isn't the best, so it is har for me to inspect properly. Looks promising though, and I will definitely test more. Could you send me link for 1.4.4 to see if it solves the issues with ArcGIS Pro?