Architectural color painting is one of the cultural heritages of the Tibetan people. To address the issues of “loss” and “variation” in architectural color paintings during the renovation of traditional Tibetan timber dwellings in Yunnan, it is essential to organize and categorize the forms and cultural content of ethnic minority timber architectural paintings. This approach will help supplement foundational research on the subject. This study, based on linguistic research findings, focuses on the Diqing South Locus Dialect Region as the research area, conducting field investigations in over 30 settlements (involving more than 80 dwellings). This study analyzes patterns, colors, and forms across various architectural elements to develop a detailed atlas of decorative painting patterns. A combined analysis of historical documentation reveals three primary folk causes behind the architectural color paintings of Tibetan timber buildings in Yunnan: (1) primitive worship under animism; (2) decorative norms guided by religious beliefs; and (3) cultural fusion resulting from ethnic heritage. This will help people understand the cultural essence behind architectural paintings, avoiding the cognitive limitation of knowing only their form but not their meaning. This paper aims to raise awareness of the cultural heritage of regional timber buildings, providing a basis for typological accumulation and model references for the protection and transmission of regional timber architectural color paintings.

The Tusi manors in the Yunnan–Tibet region exemplify historical timber-framed architecture that seamlessly blends official and vernacular styles. It integrates the characteristics of ‘distinct regionality’ and ‘convergent ethnic identity’, embodies rich construction wisdom and regional ethnic culture, and serves as ‘living’ material evidence for studying regional architectural craftsmanship. Through field surveys and on-site surveying, primary data were collected to obtain architectural samples and foundational documentation of Tusi manors in the Yunnan–Tibet region. By authenticating their prototypes and integrating regional construction practices, this study analyzed the architectural characteristics of these manors, including settlement mechanisms, site selection principles, courtyard layouts, architectural typologies, spatial configurations, and functional systems from an architectural perspective. Building on this foundation, the study incorporates natural environment and socio-cultural contexts to conduct a multidimensional analysis of these characteristics. It aims to improve awareness of the cultural heritage of regional timber-framed buildings and provide a reference basis for the conservation and inheritance of these historical buildings.

The straight mortise and tenon joints (SMTJs) of Tusi Manor, situated in the Yunnan–Tibet region of China, tend to undergo decay. This study aims to investigate the mechanism performance degradation of SMTJs due to decay. Five full-scale SMTJs were constructed and incubated with wood-rot fungi for 0, 6, 12, 18, and 24 weeks. Cyclic loading tests were conducted to assess the damage mechanisms and extent of mechanical property degradation at these different stages of decay, supported by ABAQUS finite element simulation software. The results revealed a progressive increase in damage with prolonged decay time. Comparison between decayed and undecayed specimens showed a maximum load-bearing performance degradation rate of 5.17%, 11.83%, 17.34%, and 23.54% after 6, 12, 18, and 24 weeks of fungal incubation, respectively. The cumulative energy efficiency degradation rates were 8.38%, 9.51%, 23.13%, and 33.31%, respectively. SMTJs mechanical performance degradation is correlated with wood mechanical property degradation as a function of the S-family. Finite element simulations further indicated a reduction in tenon strength from the outer parts towards the inner parts of the structure.

Vernacular architecture is a complex and living heritage type, and the study of the evolution laws of its spatial form is of great value to the conservation of architectural heritage diversity. Taking vernacular architecture in the Yunnan–Tibet area as the research object, based on the theory of spatial syntax, 30 building samples were subjected to global and local calculations of MD, I_RRA, and NACH values, while the common characteristics among the samples were obtained by using Kendall’s W test, and the individual characteristics among the samples were obtained by using differentiation analysis. The results show that: (a) vernacular architecture in the Yunnan–Tibet area exhibits characteristics of multi-cluster branched centrality and spatial hierarchical layout; (b) these architectures possess four categories of inheritance factors: the privacy of granary spaces, the centrality of corridor spaces, the passability of breeding areas, and the independence of scripture hall spaces; (c) these architectures possess three categories of differentiation factors: the functional evolution of traditional spaces, the spatial reconstruction of breeding areas, and the “Toilet Revolution” driven by multiple forces. This study elucidates the regulatory role of cultural continuity in shaping the spatial forms of vernacular architecture, providing new evidence for analyzing the formation mechanisms of vernacular architecture in the Yunnan–Tibet area.

(1) The Hoop Head Tenon-mortise Joint (HHTMJ) in the Tusi Manor in Tibetan areas in Yunnan, China, has a serious decay phenomenon. To understand the effect of decay on the seismic performance of HHTMJ, (2) the five groups of HHTMJ and small-size Pinus kesiya var. langbianensis wood mechanical property testing specimens were placed in an artificially set decay environment and cultivated together with wood decay fungi for 0, 6, 12, 18, and 24 weeks, respectively. Low-cycle repeated loading tests were conducted to compare the failure mode, hysteresis curve, skeleton curve, and cumulative energy consumption of the HHTMJ under different decay cycles. (3) The results indicate that the failure mode of the HHTMJ is fractured at the tenon shoulder, and the deformation and failure of the tenon increase with the increase in decay. Compared with the non-decayed specimens, the ultimate bearing performance of the specimens after 6, 12, 18, and 24 weeks of decay decreased by 8.83%, 16.97%, 19.69%, and 30.22%, respectively. The cumulative energy consumption decreased by 21.6%, 27.4%, 33.2%, and 41.3%, respectively. (4) Decay primarily occurs on the exterior of the tenon, with minimal decay on the interior. The degradation of seismic performance in HHTMJ is relatively close to the degradation observed in small-size wood specimens during mechanical property testing.

As living heritage actively used by communities, entrance doors in the Yunnan-Tibet region embody “hybrid aesthetics” from multi-ethnic Tibetan-Han-Bai craft integration, yet how material authenticity and communal meaning shape visual aesthetic mechanisms remains empirically unexplored. Grounded in Information Processing Theory, this exploratory pilot study investigates how object attributes of vernacular doors shape aesthetic preference through visual attractiveness as a mediator, with individual differences examined as boundary conditions in the Yunnan-Tibet region. Vernacular architecture serves as a critical medium for cultural diversity and place identity, yet quantitative research on micro-level aesthetic mechanisms remains limited. This study addresses this gap by analyzing 20 doors from Yunnan-Tibet Tibetan villages via CMFP theory-guided attribute decomposition. Exploratory PCA of eye-tracking data from 32 participants yielded a “visual attractiveness” composite, which was validated against 5-point Likert ratings. At the input stage, attractiveness perceptions were significantly enhanced by complementary colours (p = 0.011, η²=0.414), high saturation (p = 0.010, η²=0.417), glossy finishes (p = 0.045, η²=0.205), and medium-high pattern density (p = 0.036, η²=0.323), whereas material identity was nullified by coating disguises. Morphological complexity correlated with attractiveness (r = 0.585, p = 0.007), but novelty did not. Key finding: Visual attractiveness functioned as a complete mediator (78.5–101.9%), supporting attention allocation as a potential pathway for heritage aesthetic experience. Visual attractiveness and preference demonstrated perfect consistency (Kendall’s W = 1.0, p < 0.001) and strong co-variation (r = 0.859, p < 0.001), with 73.8% of variance accounted for (AP = 3.10 + 0.78×VA, R² = 0.738). Individual differences: Professional background elevated baselines (p = 0.011, d = 0.63) without moderating the VA → AP slope; physiological gender showed no effect. These findings suggest a preliminary Rural Architectural Style Scorecard prioritizing “visual anchors” for conservation intervention in Yunnan-Tibet Tibetan dwellings, offering a validated framework for digital preservation of vernacular heritage.