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"FV2+CAAS" refers to the nonlinear approach from /wiki/spaces/COM/pages/3771301899 where an aave and 2nd order FV map are used with ComputeClip-And-Assured-Sum (CAAS) to provide a monotone conservative map that avoids the blocky artifacts of aave maps and is more accurate than aave maps. FV2+CAAS is comparable in accuracy to intbilin, adds conservation, but is more expensive.
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