Yesterday after doing a clean install of Poser (this includes deleting ALL preferences), this is what I tryed. I opened Poser and loaded four runtimes. Daz Luke & Laura. Their textures. Their bodysuits. And also one prop, Devil horns (it seemed to fit the moment) which I got from the free area & is something I've never used prior to now. I loaded Luke changed his texture & put his bodysuit on and added the devil horns. I kept the default lighting but changed one of it's shadow values to .3 & map to 500 and moved their positions a bunch of times throughout my tests. I then kept changing things, body positions, lights position, light colors, doing a render every so often all the while in and out of the materials room changing colors ect. trying to push poser. I could not get it to crash. I then added a 1 sided square and enlarged it to 800% I then went to the material room applyed the devil horn texture to it & once again like above pushing poser to crash like so many times before. Just when I thought I had passed past-points of crashes... I go over to the material room & Wouldn't you know it? CRASH!!!! :>((((((((