Abstract: This paper proposes a flattening surface texture synthesis method based on graphcut texture synthesis method, simulates the transition bark texture of branches of trees with monopodial branching. To simulate the anisotropy effects of the bark texture on branches of natural growth trees with monopodial branching, this paper divides the synthetic region into sub-regions, each sub-region using different synthesis methods. Results show that this method can effectively simulate bark texture on branches of trees with monopodial branching to meet the needs of realistic rendering.