I just completed a huge kitchen with loads of custom cabinets, custom granite, tile, millwork, wood flooring, paneled integrated appliances; a floor to ceiling windowed dining room, a family room with fireplace, custom fabric furniture, huge windows, custom cabinet doors/finish and didn't have a single rendering error message. It was sloooooow by the end, but after clicking ''done'' or after clicking on something to adjust the size or finish I had time to do my housework before it stopped working on it (literally) so in a sense it wasn't all bad. But the thing is, after all that with no error messages, today I placed one cabinet in an entirely empty room and started getting constant rendering error messages before I even customized it in any way and it flatly refuses to paint in in any way at all. In a bath with just a tiled shower I get bombarded by rendering error messages. There doesn't seem to by any rhyme or reason. I'm using Chief Architect Interiors x10. I'm using a HP laptop with Windows 10.