SeedVR2 will preserve whatever edge relationships exist in your input image. If your source has slight misalignments or visible seams, the upscaler will maintain those characteristics at higher resolution, making them potentially more noticeable. For best results, ensure your input texture tiles seamlessly before upscaling. You can test this by placing four copies of your image in a 2x2 grid and checking for visible seams. If you're working with non-seamless images that need general quality enhancement, consider
Ideogram Upscale or
Recraft Creative Upscale, which optimize for overall image quality rather than edge preservation.