EZ does not have the concept of a "sun" light but often you need this information in custom shaders. With this change ez exposes the "brightest" directional light, which is typically the sun, and allows you to access its data in any shader like so:

ezPerLightData sunData = GetBrightestDirectionalLightData();
float3 sunDir = GetLightDirection(sunData);
float3 sunColor = GetLightColor(sunData);
float sunIntensity = sunData.intensity;

Note that some data like e.g. direction and color is accessed with helper functions because the data is stored compressed and requires custom unpacking. Other data like itensity can be just accessed as is.