The more batch sizes there are the more images there are

Self explanatory: More images generated, more time so generate at 4 when at higher scales, 8 at lower scales

Different outputs with the same seeds:

• masterpiece, best quality, 1girl, beautiful detailed eyes, perfect face, beautiful detailed face, looking at viewer, amazing sharp focus, ultra detailed, silver hair, large breasts, bodysuit, wetsuit, scuba diver, blue eyes, long hair, high ponytail, sleepy, sweat, breathing, soft skin, outdoors, poolside, afterglow Negative prompt: (worst quality, low quality:1.4), (monochrome:1.3), (NSFW:1.4), 3d, text, frame, jpeg artifacts, grids, watermark, logo, username, text, flowers, particles, (missing fingers:1.3), bad hands, Steps: 20, Sampler: DDIM, CFG scale: 8, Seed: 3934657048, Size: 448x576, Model hash: 6806d4c0f8, Model: anything3pruned, Denoising strength: 0.7, Clip skip: 2, Hires upscale: 1.85, Hires steps: 20, Hires upscaler: Latent (nearest-exact)