As seen in https://hub.jmonkeyengine.org/t/solved-error-invalid-matrix4f-for-worldviewprojectionmatrix/47680 and https://hub.jmonkeyengine.org/t/jmonkeyengine-v3-7-0-beta1-release/47653/12 the new assertion in GLRenderer catches incorrect setting of an objects position to infinity or NaN. However the assertion doesn't give much of a clue where the mistake was made. Just that it has. I'm proposing adding some assertions to the Transform class in order to catch these mistakes "when they go in".