Mr Sky Portal was introduced in Max 2008 (see image).
Clivej - please put your Max version (and brief system specs) in your signature (accessed via your User Profile). It helps avoid the confusion seen above.
Also, please choose the most appropriate forum for your question e.g. not Max 2010 when you have Max 9.
Thread moved to "Max through 2008" (for obvious reasons
😉 )
Max 2016 (SP1/EXT1)
Win7Pro x64 (SP1). i5-3570K @ 4.4GHz, 8Gb Ram, DX11.
nVidia GTX760 (2GB) (Driver 430.86).