Advanced OpenGL Settings in the Visualization Menu

These options are available under VRED Visualization > Advanced OpenGL Settings.

• Wireframe: The wireframe button toggles wireframe rendering to On or Off. All currently selected objects are drawn in set render mode and a wireframe mode. The wireframe color can be set in: Edit > Preferences > Render Options > Wireframe.

• Two-Sided Lighting: Enables/disables two-sided lighting. It allows toggling the illumination of polygon backsides globally.

• Realtime shadow: Activates/deactivates real time shadows. Only available in OpenGL mode.

• Ambient Occlusion Shadows: Activates Ambient Occlusion calculation.

• Screen Space Ambient Occlusion Settings: Opens the Screen Space Ambient Occlusion Settings dialog box where you can enable SSAO and define the following options:

  Radius

  The radius of the virtual hemisphere outside which occlusion is ignored.

  Intensity

  The darkness of the occlusion. The higher the value, the darker the shadows.

  Blur Amount

  The amount of blur to apply to the occlusion.

  SSAO provides an efficient, realtime approximation of the baked ambient occlusion (AO). Although SSAO will never be as good as precomputed AO, or even baked lighting and shadows, SSAO is good for quick previews.

• Geometry Light Sources: Only active if Realtime Shadow is selected. Treats self-illuminated geometries as light source. Only in OpenGL render mode.

• Backface Culling: Activates/deactivates backface culling. Backface culling renders only the faces with normals pointing toward the camera.

• Occlusion Culling: Renders visible geometries only; the render engine excludes polygons/patches hidden by other objects on rendering.

• Depth Only Pass: Renders the scene once using only the depth values. It can be used for optimization with complex shaders.