Effects/projection-2d /sim/current-view/field-of-view /surround/vfov /surround/auto-vfov /surround/enable-overlay /surround/testx /surround/testy /surround/testz /sim/startup/xsize /sim/startup/ysize Shaders/projection.frag 2 cubemap display_x int display_xsize display_y int display_ysize hfov float hfov i_vfov float vfov auto_vfov int auto_vfov enable_overlay int enable_overlay iChannel0 sampler-cube 2 i_rot_x float rot_x i_rot_y float rot_y i_rot_z float rot_z