Parameters are accessed with C4DAtom::GetParameter()/ C4DAtom::SetParameter(). See page_maxonapi_getting_started_foundations_cinema_parameters.
Parameter: Density
PYRO_OBJECT_DENSITY
Parameter: Color
PYRO_OBJECT_COLOR
Parameter: Temperature
PYRO_OBJECT_TEMPERATURE
Parameter: Fuel
PYRO_OBJECT_FUEL
Parameter: Velocity
PYRO_OBJECT_VELOCITY
Parameter: Mask Velocity
PYRO_OBJECT_MASK_VELOCITY
Parameter: Pressure
PYRO_OBJECT_PRESSURE
Parameter: Divergence
PYRO_OBJECT_DIVERGENCE
Parameter: Dual Rest Grid
PYRO_OBJECT_RESTGRID
Parameter: Highres Download
PYRO_OBJECT_HIGHRES
Parameter: Enabled
PYRO_OBJECT_CACHE_ENABLED
Parameter: Filename
PYRO_OBJECT_CACHE_PATH
Parameter: Cache Paths
PYRO_OBJECT_CACHE_PATHS
Parameter: Template Filename
PYRO_OBJECT_CACHE_PATH_TEMPLATE
Parameter: Cache Scene
PYRO_OBJECT_CACHE_TRIGGER_SCENE
Parameter: Cache
PYRO_OBJECT_CACHE_TRIGGER
Parameter: Delete Selected Caches
PYRO_OBJECT_CACHE_CLEAR
Parameter: Upres Scene
PYRO_OBJECT_CACHE_TRIGGER_SCENE_UPRES
Parameter: Upres Active Cache
PYRO_OBJECT_CACHE_TRIGGER_SCENE_UPRES_OLDSCENE
Parameter: Upres Factor
PYRO_OBJECT_UPRES_FACTOR
Parameter: Additional Octaves
PYRO_OBJECT_UPRES_ADDITIONAL_OCTAVES
Parameter: Noise Strength
PYRO_OBJECT_UPRES_NOISE_STRENGTH
Parameter: Noise Scale
PYRO_OBJECT_UPRES_NOISE_SCALE
Parameter: Animation Speed
PYRO_OBJECT_UPRES_TIME_ANIMATION
Parameter: Noise Falloff
PYRO_OBJECT_UPRES_FIELDS
Parameter: Scene
PYRO_OBJECT_SCENE_LINK
Parameter: Link to Default Scene
PYRO_OBJECT_LINK_TO_DEFAULT