Thanks hborre...

It's a shame, when using the HDRI control script from Ken1171 the whole system breaks down. The Poser menu can no longer be used. When you click - File - New - Poser 13 freezes completely and then crashes. The FX menu is no longer usable. When you open the script, there is a popup window that asks you to log in to Renderosity's Purchase Server. Having to pay $19.95 for this is an imposition.