Hi,
No, you can't have that.
Even if you had that, you would not be able to vary the image based on characteristic B, since, for this to happen, you need to configure different images for the different variants.
But why is it a problem to have a hundred variant ?
Note that you can add the variants in two steps:
- you add characteristic A to the product
- you add the variants for characteristic A
- you configure each variant
- you add characteristic B to the product
- you duplicate the variants for the other values of characteristic B
That way, you don't necessarily have to configure all the 100 variants if only characteristic A requires different configuration for each variant.