Normalize specular simulation even if no background set

In !1909 (merged), by mistake, specular intensity normalization occurs only when a background is set.

To be backported to r21.1.

Seems you have to replace the reference data?

approved this merge request

Seems like that

added 1 commit

• 330221dd - upd ref data

Compare with previous version

enabled an automatic merge when the pipeline for 330221dd succeeds

mentioned in commit 78844a6b

merged