## 3 Results and Discussions
### Three-Dimensional Scanning of Sample 2  
From Table S4 of the Supplementary File, watertightness was found to be significant and simplification was again found to be insignificant for a texture scan with the smoothness ON and the sharpness OFF (as per mode A of 3D scanning, Table 2 of the main manuscript) for complex object S2. As watertightness was significant, its PCR value was the highest out of all the other factors. Moreover, a simplification of 70% and UW were found to be the optimal levels from the main effects plot, shown in the Figure S8 of the Supplementary File, toward reducing the volumetric error after the complex object was scanned three dimensionally. However, the error PCR was still, higher than the PCR for simplification. Therefore, the interaction plots were made again to determine whether there a combined effect of both simplification and watertightness was present or not. In Figure S9 of the Supplementary File, the lines starting from HW to LW had an interaction with a severity index (SI) of 88.89% between 50% and 70% levels of simplification. Likewise, an interaction with an SI of 61.12% was found for the same levels of simplification when the lines in the interaction plot proceeded ahead from LW to MW. Therefore, these levels of simplification, i.e., 50% and 70%, affected the error in 3D scanning when they were combined with HW and LW. On the other hand, an interaction with an SI of 50% was also found between 50% and 60% when the lines of the interaction plots started at LW and ended at MW. Negligible interactions are found for the line regions between MW and UW. Therefore, severe interactions are found when the lines started from HW, and their severity reduced as they approached UW. Furthermore, the presence of severe interactions can be determined to be the real cause of a higher PCR value than that of simplification. For S2, using the texture mode of 3D scanning with the sharpness ON and the smoothness OFF (as per mode B of 3D scanning of Table 2), all the 3D scanning factors were found to be insignificant, as is shown in Table S5 of the Supplementary File. As far as the PCRs were concerned, the watertightness PCR was evaluated to be higher than the PCR of simplification. Unfortunately, the error PCR was again evaluated to be higher than the other PCR values. Hence, it is highly likely that combined effects were present. This can be seen clearly with the help of interaction plots. A maximum SI value of 72.23% was also found for the possible interactions, as shown in Figure S11 of the Supplementary File. Furthermore, the plot of the main effects indicated that 60% and MW were the optimal levels of simplification and watertightness, respectively, as shown in Figure S10 of the Supplementary File. From Table S6 of the Supplementary File, all 3D scanning factors were found to be insignificant when the non-texture modes of scanning and smoothness were ON and the sharpness was OFF (as per mode C of 3D scanning of Table 2) with the S2 sample. The simplification PCR was evaluated to be higher than the watertightness PCR. The error PCR was evaluated to be the highest among all PCRs. The plot of the main effects indicated that MW and 50% were found to be the optimal levels of watertightness and simplification, respectively, as shown in Figure S12 of supplementary file, toward reducing the 3D scanning error with mode C of 3D scanning. However, the highest error PCR suggested plotting the interaction plots to find its cause. From the interaction plot shown in Figure S13 of the Supplementary File, it was quite evident that the SI was found to be significant with a value greater than 75% and lower than 84% for all kinds of possible interactions between possible combinations of levels of watertightness and simplification.