Savannah Cats Pattern is spotted only which is the only accepted by TICA. Solid one color spots are the only pattern found on the African Serval Cat, due to this fact Spots are the pattern acceptable. The spots should follow across the body and not be connected.
Pictures above are of correct horizontal spotting pattern!
Non-standard patterns are recessive domestic patterns. Nothing is wrong with breeding a non-standard patterns if said cat posses above average breed type. If the cat is only average breed confirmation with non-standard quality then it should not be in a breeding program. The following statement is an example of "selling" non-standard patterns. Rosettes are non-standard because Serval Cats do not have rosettes. If you desire rosettes they are a approved Bengal pattern.