Parameters are accessed with C4DAtom::GetParameter()/ C4DAtom::SetParameter(). See Parameter IDs.
Parameter: Color
AMBIENTOCCLUSIONSHADER_GRADIENT
Parameter: Minimum Ray Length
AMBIENTOCCLUSIONSHADER_MINLENGTH
Parameter: Maximum Ray Length
AMBIENTOCCLUSIONSHADER_MAXLENGTH
Parameter: Dispersion
AMBIENTOCCLUSIONSHADER_DISPERSION
Parameter: Accuracy
AMBIENTOCCLUSIONSHADER_ACCURACY
Parameter: Minimum Samples
AMBIENTOCCLUSIONSHADER_MINSAMPLES
Parameter: Maximum Samples
AMBIENTOCCLUSIONSHADER_MAXSAMPLES
Parameter: Contrast
AMBIENTOCCLUSIONSHADER_CONTRAST
Parameter: Use Sky Environment
AMBIENTOCCLUSIONSHADER_ENVIRONMENT
Parameter: Evaluate Transparency
AMBIENTOCCLUSIONSHADER_TRANSPARENCY
Parameter: Self Shadowing Only
AMBIENTOCCLUSIONSHADER_SELFTEST
Parameter: Invert Direction
AMBIENTOCCLUSIONSHADER_REVERSE