Parameters are accessed with C4DAtom::GetParameter()/ C4DAtom::SetParameter(). See page_maxonapi_getting_started_foundations_cinema_parameters.
Parameter: Location
GI_REAL_SKY_PAGE_LOCATION
Parameter: Global
GI_REAL_SKY_PAGE_GLOBAL
Parameter: Sky
GI_REAL_SKY_PAGE_SKY
Parameter: Sun
GI_REAL_SKY_PAGE_SUN
Parameter: Atm
GI_REAL_SKY_PAGE_ATM
Parameter: Latitude
GI_REAL_SKY_LATITUDE
Parameter: Longitude
GI_REAL_SKY_LONGITUDE
Parameter: Time
GI_REAL_SKY_DATETIME
Parameter: Time Zone Offset
GI_REAL_SKY_TIME_ZONE
Parameter: Show Location HUD
GI_REAL_SKY_HUD
Parameter: Turbidity
GI_REAL_SKY_TURBIDITY
Parameter: Ozone
GI_REAL_SKY_OZONE
Parameter: Enabled
GI_REAL_SKY_SKY_ENABLED
Parameter: Horizon Line
GI_REAL_SKY_SKY_HORIZON
Parameter: Use Warm Colors
GI_REAL_SKY_SKY_WARM_COLORS
Parameter: Use Chroma Color Map
GI_REAL_SKY_SKY_CHROMA
Parameter: Intensity
GI_REAL_SKY_SKY_INTENSITY
Parameter: Night Intensity Ratio
GI_REAL_SKY_SKY_INTENSITY_NIGHT
Parameter: Saturation Correction
GI_REAL_SKY_SKY_SATURATION
Parameter: Hue Correction
GI_REAL_SKY_SKY_HUE
Parameter: Gamma Correction
GI_REAL_SKY_SKY_GAMMA
Parameter: As Seen Intensity Ratio
GI_REAL_SKY_SKY_SEEN_RATIO
Parameter: Preview Color
GI_REAL_SKY_SUN_COLOR
Parameter: Enabled
GI_REAL_SKY_SUN_ENABLED
Parameter: Use Warm Colors
GI_REAL_SKY_SUN_WARM_COLORS
Parameter: Shadow Color
GI_REAL_SKY_SUN_SHADOW_COLOR
Parameter: Intensity
GI_REAL_SKY_SUN_INTENSITY
Parameter: Saturation Correction
GI_REAL_SKY_SUN_SATURATION
Parameter: Hue Correction
GI_REAL_SKY_SUN_HUE
Parameter: Gamma Correction
GI_REAL_SKY_SUN_GAMMA
Parameter: Size Ratio
GI_REAL_SKY_SUN_SIZE_RATIO
Parameter: As Seen Intensity Ratio
GI_REAL_SKY_SUN_SEEN_RATIO
Parameter: Sampling Count
GI_REAL_SKY_SUN_SAMPLING_SAMPLES
Parameter: Sampling Quality
GI_REAL_SKY_SUN_SAMPLING_QUALITY
Parameter: Enabled
GI_REAL_SKY_ATM_ENABLED
Parameter: Intensity
GI_REAL_SKY_ATM_INTENSITY
Parameter: Saturation Correction
GI_REAL_SKY_ATM_SATURATION
Parameter: Hue Correction
GI_REAL_SKY_ATM_HUE
Parameter: Gamma Correction
GI_REAL_SKY_ATM_GAMMA
Parameter: Scene Scale Ratio
GI_REAL_SKY_ATM_SCALE_RATIO
Parameter: Create Bitmap
GI_REAL_SKY_BITMAP
Parameter: Create Animation
GI_REAL_SKY_SEQ