Rendering only when paning or rotating view in Rendered Viewport

Have a weird issu in the Rendered Viewport. The objects are totally flat colored when not moving. As soon as I pan or rotate the viewport, it appears rendered…

Have no idea what cause this…

Do other files act the same way?
If not, then please post this file.

If other files act the same way, and assuming you’re running Rhino V6, please run the SystemInfo command and post the results.
Maybe that will have a clue.

We have Rhino 5. Sorry, system info in french!

Système d’exploitation Microsoft Windows 7 Professionnel
Version 6.1.7601 Service Pack 1 Build 7601
Éditeur Microsoft Corporation
Modèle HP Z240 Tower Workstation
Type PC à base de x64
Processeur Intel® Xeon® CPU E3-1240 v5 @ 3.50GHz, 3501 MHz, 4 cœur(s), 8 processeur(s) logique(s)
Version du BIOS/Date HP N51 Ver. 01.54, 2017-05-02
Version SMBIOS 2.7
Périphérique de démarrage \Device\HarddiskVolume3
Option régionale Canada
Couche d’abstraction matérielle Version = “6.1.7601.24024”
Fuseaux horaires Est
Mémoire physique (RAM) installée 16.0 Go
Mémoire physique totale 15.9 Go
Mémoire physique disponible 3.18 Go
Mémoire virtuelle totale 31.8 Go
Mémoire virtuelle disponible 13.0 Go
Espace pour le fichier d’échange 15.9 Go
Fichier d’échange C:\pagefile.sys

On a another projet, I have the opposite. Rendered when not moving, and flat color when moving.

Hum… forget about it, with no reson, everything is working now! Was turning crazy!

Thx!

In Windows Device Manager, what Display Adapters do you have and what are the dates of the drivers?

This could also be some strange display mode setting.