Surface brightness and GGM and DoG response to the tSZ signal expected for a spherically symmetric gNFW pressure profile (top), a bimodal cluster plus a pressure bar (middle), and a main core plus an extension (bottom). Left: tSZ simulated surface brightness. The white circle on the bottom left provides the beam FWHM. Middle: GGM filtered maps with θ₀ = 15′′. The white vectors represent the direction of the gradient, Ψ. Right: DoG filtered maps with θ₁ = 15′′ and θ₂ = 45′′.