Effects/HDR/atmos-sky-view /sim/rendering/hdr/atmos/aerosol-type /sim/rendering/hdr/atmos/aerosol-turbidity /sim/rendering/hdr/atmos/ground-albedo /sim/time/utc/month Shaders/HDR/quad.vert Shaders/HDR/atmos_sky_view.frag Shaders/HDR/math.glsl Shaders/HDR/atmos.glsl transmittance_lut sampler-2d 0 aerosol_type int aerosol-type aerosol_turbidity float aerosol-turbidity ground_albedo float ground-albedo month_of_the_year int month-of-the-year