Pixeleted model when put in render view

URGENT HELP !!!

HI THERE,
I NEED HELP, I DONT KNOW WHAT HAPPEN TO THE RHINO 7
BUT WHEN I PUT IN RENDER VIEW (MAXWELLFIRE) IT PIXELETED ALL THE MODEL AND WHEN I SEND IT TO RENDER SOME PARTS OF THE MODEL GET BLACK


BUT IN THE OTHER TIPE OF VIEWS THE MODEL IS OK

That’s what a pathtracing render looks like until it’s resolved…did you just notice this?

HI Jim, but when i preview other models, doesnt happen that … i copy in a new rhino file and its still happen :confused:
also when i send it to render … looks pixeleted and had the lilttle black marks on it !