There's no need for a lie, as your irony implies.

Rincewind never claimed that he did an invention. All he did are models in his spare time as a contribution. He had fun to make them and he had fun to contribute them for nothing. And, at least me, I had fun to look at them.

There are some similarities to dexsoft's modelpack, but to say it is a copy of them sounds like an accuse that isn't true when having a close look.
He doesn't compete with the mid-poly and normal mapped models of dexsoft. And he never said that he wants to compete with his low-polygon and low-resolution models, right?