When changing the material type of a HDRP Lit output in VFX Graph to six way smoke and then back to standard, the field in the inspector for "Use base color map" gets reset to None, hiding the base color map field.
This issue was found on 23.2 , 100% repro
Repro on 22.2
Repro: create a VFX with HDRP Lit output
change material type to smoke 6 way
change back to standard
use base color map gets set to "none"