## 1 Introduction  
In recent years, resin-based 3D printing has evolved beyond being just a tool for rapid prototyping--it is increasingly being used to produce functional components that are expected to perform under real-world loads. Technologies like masked stereolithography (MSLA) have opened up new possibilities thanks to their ability to create highly detailed and smooth parts at a relatively low cost. However, as this technology advances toward industrial and structural applications, questions about the actual load-bearing capacity of printed parts become increasingly pressing. Factors such as the orientation of the print and how the object is filled internally can make a surprising difference in how the part behaves when put to the test. While there is growing interest in optimizing materials and post-curing techniques, less attention has been paid to how these print settings interact to affect mechanical performance. This research provides a closer examination of this issue, offering practical insights into how orientation and infill choices can significantly impact the durability and efficiency of resin-printed parts. [PERSON] and [PERSON] [1] developed detailed design guidelines for mSLA technology, highlighting that excessively thin walls, undercuts, and small holes can lead to significant manufacturing defects. It was noted that incorrect orientation and improper post-curingcan lead to deformation or delamination, which directly affects the load-bearing capacity of printed parts [1]. A broader-spectrum study was conducted by [PERSON] et al. [2], who investigated the impact of 3D printing processes in three main categories: geometric, process parameters, and structural settings. In particular, their work highlights the influence of raster orientation, infill pattern, and layer thickness on mechanical properties and emphasizes the problem of anisotropy, a key issue in resin systems [2]. [PERSON] and [PERSON] [3], comparing MSLA and FDM technologies, found that MSLA generally provides better surface quality, while FDM can result in more accurate geometric edges. Orientation has emerged as a critical factor in both technologies, especially along the Z-axis, which is prone to layer separation. Similar conclusions were reached by [PERSON] et al. [4], who, in an investigation of their own SLA system, noted that excessively long exposure times and inappropriate orientations can lead to increased dimensional deviations in the Z-direction and structural weakening [3,4]. [PERSON] et al. [5] performed comparative measurements on a benchmark using FDM and MSLA technologies. The MSLA method printed finer details but proved to be more sensitive to geometric distortions in certain directions, especially in the Z direction. Their results confirmed that CAD-STL conversion and orientation are critical points for load-bearing stability [5]. Mechanical and thermal properties were analyzed by [PERSON] et al. [6] using DMA and HDT measurements, which showed that post-curing time significantly increases the glass transition temperature, elastic modulus, and mesh density of resin-based parts. The printing direction also had a crucial influence on the fracture behavior: parts printed in the X direction showed higher strength, while those printed in the Z direction were more prone to delamination [6]. Another advance was the work of [PERSON] et al. [7], who fabricated porous biosilicate/carbon composites using MSLA technology, demonstrating that tight control of resin composition, porosity, and heat treatment allows the fabrication of load-bearing porous structures, confirming that, with a suitable printing strategy, resin printing can be used not only for prototyping but also for structural purposes [7]. An example of an industrial application is provided by [PERSON] et al. [8], who utilized TR300 resin for the production of extrusion dies using the MSLA process.