TheSkyAtmosphereLightIlluminanceexpression takes in the Atmospheric Light Index for a Directional Light and outputs illuminance reaching the skydome world position (see note below). This is illuminance, so it needs to be integrated against a BxD/phase function to get luminance to accumulate. A multi...
-virtual voidSetAtmosphereRelatedProperties(FLinearColor TransmittanceFactor, FLinearColor SunOuterSpaceLuminance, bool bApplyAtmosphereTransmittanceToLightShaderParamIn) override + virtual void SetAtmosphereRelatedProperties(FLinearColor TransmittanceFactor, FLinearColor SunOuterSpaceIlluminance, FLinearColor SunOuterS...
That's then multiplied over the sun's color, which is a parameter in Legacy Coloring, and based on LightIlluminance in Sky Atmosphere. Then, the cloud layers are lerped on top, in the "Add Dynamic Clouds" section. The Composite Cloud Layers function contains the two "Cloud Layer" ...
Vertical illuminanceDensity functionBuilding facadeProper assessment of building faade illumination by natural daylight is a key factor in active utilization of renewable solar energy. Theoretical modeling of sky luminance distribution supported by long-term measurements in a local atmosphere is useful in ...
Near human settlements, the brightness of the night sky is made up of light from both natural and artificial sources. Celestial light can travel directly to an observer (allowing one to see stars, galaxies, etc.), or it can scatter in the atmosphere and contribute to the diffuse glow of ...
The SkyAtmosphere system is used to create physically-based sky and atmosphere rendering with time-of-day features and ground-to-space view transitions ...
A light spectrum resembling modern outdoor lighting An adjustable illuminance, dimmable within the range of 0.01–10 lx at the water surface Minimum blocking of natural light sources such as sunlight, moonlight and starlight An open water surface to ensure free gas exchange with the atmosphere ...
Zenith luminance increased locally by up to a factor of 8 and illuminance increased by about 50% at the observation spot within the park. The radiance detected by night-time satellite was also increased during the festival. This is the first time, that light pollution from such a major rock...
Ground-based optical astronomy necessarily involves sensing the light of astronomical objects along with the contributions of many natural sources ranging from the Earth’s atmosphere to cosmological light. In addition, astronomers have long contended with artificial light pollution, which further adds to...
相位函数中的/theta是平行光方向和相机方向的夹角,这里平行光方向是从SkyAtmosphereLightDirection这个节点取到的。 积分 constfloatboost=1.0f;float3S=SunLightIlluminance*phase*sigmaS*boost;float3ScattLuminance=(S-S*TransmittanceRGB)/sigmaE; 虽然只计算了一次,但是也要根据透光率进行一次积分的合成。这个地方没有...