From the service release readme: SHADOW MAP FILES Poser creates temporary shadow map TMP files. Beginning with SR-2.1, these files will be placed in the root Poser 5 folder (typically C:Program FilesCurious LabsPoser 5) and will be deleted if: - The scene completes rendering - The user cancels the render - The render fails Shadow Map TMP files are named for their assigned light, for example: - spotLight 1_shadow_0001.tmp - LIGHT1_shadow_0001.tmp Please search for and remove these Shadow Map temp files from your system.