Heavens forfend; I asked AI. It didn't like 'nebuly'. But it said the variant 'nebulé' occurred in the Oxford English Dictionary referenced to John Lydgate's use c. 1450. So, there could have been significant usage before that. And I would be looking to French language examples, if there are any.
Another thing mentioned was the potential confusion between an insignia with multiple, nebuly bands and the heraldic fur pattern called vair as seen below.
You are not allowed to view links. Register or Login to view.
Examples become more ambiguous, if the traditional argent-and-azure tincture combination for vair is altered. Fortunately, in the "wolkenbands" and in the elemental representations there is no such confusion. The natural expectation is the cloudy interpretation, not squirrel fur.
Another thing mentioned was the potential confusion between an insignia with multiple, nebuly bands and the heraldic fur pattern called vair as seen below.
You are not allowed to view links. Register or Login to view.
Examples become more ambiguous, if the traditional argent-and-azure tincture combination for vair is altered. Fortunately, in the "wolkenbands" and in the elemental representations there is no such confusion. The natural expectation is the cloudy interpretation, not squirrel fur.