The Background Mode dropdown selects between the major effect types.

The default - COLOR - is a simple colored vignette. This has no other controls outside Effect Settings.

TIP: All Mask Modes can be used with all Background Modes - for example, MASK with BLUR will blur everything in the periphery except masked objects.

Note that when using the VRTunnellingProMobile component, both COLOR and SKYBOX modes allow the Iris Z Rejection feature, an optimization that saves pixel fillrate and overdraw. Before the scene is drawn, this writes to the z-buffer where the vignette is opaque. This stops pixels being written only to be obscured by the effect. This feature kicks in automatically, so long as the mobile component's Mask Mode is set to Off.

Background Modes

TIP: The mobile version cannot use BLUR mode. Please see the mobile manual page for details.

Left: COLOR mode. Right: SKYBOX mode.