Manuscripts not meant for public use or not meant for a fine edition sometimes have lesser quality artwork, pretty comparable to the Voynich. Check out this You are not allowed to view links. Register or Login to view. for some examples.
Also, even formal painted manuscripts might not always have great artists behind them. You are not allowed to view links. Register or Login to view.
The one thing about the Voynich that strikes me, is that the paint used to color the MS looks unusually thin and badly applied. This makes me think amateur more than anything else -- like the guy didn't know how to mix paint correctly so ended up with stuff that was too runny and transparent (or else was being excessively frugal with it and trying to extend it by adding too much water.)
Also, even formal painted manuscripts might not always have great artists behind them. You are not allowed to view links. Register or Login to view.
The one thing about the Voynich that strikes me, is that the paint used to color the MS looks unusually thin and badly applied. This makes me think amateur more than anything else -- like the guy didn't know how to mix paint correctly so ended up with stuff that was too runny and transparent (or else was being excessively frugal with it and trying to extend it by adding too much water.)