## 3 Results and Discussion
5): structural elements of the building are marked on the photogrammetric model (**a**); a draft drawing that only reflects general graphical features (**b**); a draft drawing that displays the constructive meaning of architectural elements (**c**); final drawing with final contracts displayed and a dot image of small elements (**d**). In the field, it is sometimes impossible to assemble a studio, so the shooting process should be simplified by limiting the equipment to daylight diffused light, a stand, a scale bar, and white drapery. Shooting under these conditions is carried out by walking around a stationary artifact. With soft diffused illumination the results are not affected [18]. By setting the camera statically and turning the turntable with the artifact at a certain angle, a circuit made up of 16-24 shots is created. Furthermore, the camera installation angle changes in height by 15-20\({}^{\circ}\) and the procedure is repeated. Thus, several survey cones are obtained, which allows one to create a 3D model of the artifact (Figure 24). The scale bar presented in the model allows the item to be scaled to natural size, afterwards it is removed. Figure 5:6 Photo studio for object shooting: turntable, SLR camera, tripod, camera control panel, white fabric in the background, and circular illumination lamp. Figure 5:7 Illustration of the shooting algorithm on one of the artifacts from the territory of the Markul settlement. This technique was initially conceived when creating samples for the virtual exhibition of the museum of the history of the resort city of Sochi [19]. It was then applied to the artifacts that were found during the excavations of the Markul settlement. In 2020, a bowl was found, and 2021 yielded a large number of finds, including pithos and five vessels from the burial. Their preservation is of both scientific and public interest. The construction of 3D models of small objects, carried out according to proven algorithms, produced suitable results. The necessary measurements were made for them, and projections and sections were built (Figure 25). When performing photogrammetry on large and heavy pithoses, we encountered certain technical challenges. The weight and size of these items did not allow us to create a photo studio in the field that fully functioned with the shooting technology. Pithos were filmed in the open air on the grass, first in the usual position, and then upside down. As a result, the reflection of light from the grass produced color on the bottom surface of the pithos, and the light from the sky produced shadows. This hindered the automatic recognition and stitching of the two series, i.e., bottom and top. Therefore, to obtain a complete 3D model, the two halves had to be stitched by hand in 3 DsMax. In this regard, the finished model exhibits slight differences in the texture of the upper and lower half of the pithos (Figure 26). Figure 5:8 Examples of artifact photogrammetry. We were unable to reshoot the pithos due to it being the end of the season, but technical measures and shooting conditions were outlined in order to avoid such faults:  
* the use of a white fabric when shooting excludes any color from light reflections;
* separation of the object from the surface of the earth excludes dense shadows (with the use of a pedestal, stand);
* the use of diffused artificial lighting in the form of a ring lamp excludes oblique shadows or the soft diffused light of an overcast sky;
* using a turntable was beneficial. All the above actions, in some way, can be reduced to organizing a photo studio on site in the field for object shooting. Labor costs for its construction will be covered by the time of subsequent processing of the material.