Use a single prompt template plus one reference image for angle and lighting, fix aspect ratio/resolution (2048×2048, sRGB), and reuse the same seed/sampler settings for all variants. Generate base pose/angle images via image-to-image, then color-swap variants. Batch-export with consistent filenames like SKU_color_angle.jpg. Post-process with ImageMagick or Photoshop for trimming, color profile, and WebP compression. Import to Shopify via CSV mapping image URLs to variant SKUs.

For straightforward batch generation and fine control, try Leonardo AI — compare: Compare Leonardo AI and Midjourney