Hi,

www.arjorozendaal.com/temp/openglview.jpg
www.arjorozendaal.com/temp/renderedview.jpg

This type of artefacts make the opengl preview quite useless for me

The artefacts might be a result of Z buffer inaccuracy. The driver might (unlikely) use a low z buffer depth for shaded OpenGL, or then the View Properties/Draw tab/Clipping/Near and Far distance are set to cover a too wide range. In architectural models, a suitable clip range could be 1 - 1000 meters. Be careful with units; the clipping range obeys the chosen measuring unit (file menu/preferences/metrics/distance). If the scene is built into a non-standard scale, the default clip range might be too low or too high.

Best regards,

Vesa

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