The texture of Rockery carving, serving as a key element in conveying the shape, color, texture, and form of rockeries, functions as both a focal point and a challenge in rockery construction. Moreover, it reflects essential techniques in stone stacking. Given the limited theoretical research on traditional rockery carving techniques in Hangzhou and the damage to rockery textures caused by natural weathering, improper restoration, and overgrown vegetation, this study employs 3D digital technology to develop digital models of the Huanglong Cave and Jiangzhuang rockeries. The quantitative analysis of texture complexity, contour complexity, and texture richness revealed the following results: Texture complexity Jiangzhuang (4.475) > Huanglong Cave (3.731); Contour complexity Huanglong Cave (1.247) > Jiangzhuang (1.203); Texture richness Jiangzhuang (0.173) > Huanglong Cave (0.106). Based on these results, the study identifies key construction techniques influencing the morphology of traditional Hangzhou rockery textures: The use of “concealment” and “risk creation” techniques enhances spatial expression, while “standing peaks” and “circular stacking” improve the formation of stone peaks and hole structures, amplifying the texture’s visual impact. Organizational patterns such as “horizontal-vertical interlacing” and “circular-curve interdependence” help guide visual perception, emphasizing texture morphology and enhancing the overall composition of the rockery. This study aims to distill the characteristics of traditional Hangzhou rockery carving techniques and provide theoretical references for the restoration of Hangzhou’s rockery heritage and contemporary stone stacking practices.