Ensure that chromatic adaptation transform can be entirely bypassed in "colour.matrix_idt" definition.
@@ -615,6 +615,7 @@ def training_data_sds_to_XYZ(training_data,
XYZ_w = np.dot(np.transpose(cmfs.values), illuminant.values)
XYZ_w *= 1 / XYZ_w[1]
+ if chromatic_adaptation_transform is not None:
M_CAT = matrix_chromatic_adaptation_VonKries(
XYZ_w, xy_to_XYZ(RGB_COLOURSPACE_ACES2065_1.whitepoint),
chromatic_adaptation_transform)
