No, for example pq curve allows 10000nits but most hdr10 blurays are just 1000nits.
IMHO SDR intensity_target should be set to 100 (nits), the problem is that we have pratically 2 sdr standards
1)middle-gray at 18 nits and white at 100 nits
2)middle-gray at 26 nits and white at 200-300 nits
The latter is used in commercial non calibrated tvs, however sdr blurays are graded using the real standard gray at 0.18 and white at 1.0 so this should be the default.
It could be usefull to allow the conversion between this two standard using a power function curve.
Min_nits could be paratically set always to 0.
relative_to_max_display: here it’s important the linear_below option, the tone mapping operator will only roll-off the highlights, values under the linear_below are left unchanged (similat ro the bt.2390 tone mapping)