Well by way of a disclaimer, this isn't my research, and my biology BSc was more than a third of a century ago, so all I was offering was a general comment.
But if Animal A is mimicking Animal B, and B is blind but uses scent/taste and touch, then we can safely deduce that looking right is not important...
And we can safely assume that there is no miraculous intervention. (If someone can't safely assume that, then they're religious and no argument will dissuade them. If it were a deity, which it wasn't, then they could make a more convincing looking fake!)
So, aside from odours, pheromones etc., then we just have to consider what's left. And that is touch, so it seems probable that feeling right is important.
But if Animal A is mimicking Animal B, and B is blind but uses scent/taste and touch, then we can safely deduce that looking right is not important...
And we can safely assume that there is no miraculous intervention. (If someone can't safely assume that, then they're religious and no argument will dissuade them. If it were a deity, which it wasn't, then they could make a more convincing looking fake!)
So, aside from odours, pheromones etc., then we just have to consider what's left. And that is touch, so it seems probable that feeling right is important.