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invalid transition: getFromColor(uv) MUST render when progress=0.0, getToColor(uv) MUST render when progress=1.0 – DEBUG: 0:rgba(0,0,0,0) 1:rgba(0,0,0,0) 2:rgba(0,0,0,0) 3:rgba(0,0,0,0) 4:rgba(0,0,0,0) ; 0:rgba(0,0,0,0) 1:rgba(0,0,0,0) 2:rgba(0,0,0,0) 3:rgba(0,0,0,0) 4:rgba(0,0,0,0)