Hi Chuck, I've had similar, model induced issues in scenes before. Drag each model into the browser creating a library, duplicate your scene deleting all the existing objects and drag the browser objects back two or three at a time until you have a failure during render. Speeds up the identification process. Don't be surprised if you never reproduce the failure after dragging models saved in the browser back into your scene though. Sometimes saving objects into the browser "fixes" issues with models. Working with models from other programs like Poser, Amapi etc., but importing them as .obj or .3ds files will sometimes create duplicate vertexes when imported into Carrara and seem to create more render failures than others. If presented with the option to "Weld identical vertices" pops up, select it. These kind of things drive me nuts and seem to increase as the deadlines decrease! BTW, failed renderings due to mesh/normals/texture issues is not unique to Carrara. ;) Good luck tracking it down.