0c4c092b9f
On VR with visibility masking the depth buffer is first set to the nearest possible value in parts of the frame that won't be visible through the VR headset's lenses. This is meant to reduce GPU fragment load. The sky dome however is rendered with depth testing disabled which bypasses the visibility masking. To allow invisible parts of the sky dome to be culled, enable depth testing but set the depth mask to false to prevent modification of the depth buffer.
SimGear - Simulator Construction Tools ====================================== http://www.flightgear.org SimGear is a set of open-source libraries designed to be used as building blocks for quickly assembling 3d simulations, games, and visualization applications. SimGear is developed by the FlightGear project and also provides the base for the FlightGear Flight Simulator. Source code for SimGear is released under the GNU Library General Public License (LGPL) - see COPYING for license details. See INSTALL file for help on building SimGear.