Made using img2img of a similar pose from another generated image. This is the img2img reference I used

(masterpiece), (8k), Smile, ((realism detail)), (raytracing), (best quality), (cinematic lighting),fluttershy,((pony)), triadic lighting, (photo background), best quality, High Definition, light particles, firm anatomy, highres, by wlop, artgerm, embellishments
Width: 768
Height: 768
Seed: 985105
Steps: 25
Guidance Scale: 7.5
Prompt Strength: 0.8
Use Face Correction: None
Use Upscaling: RealESRGANx4plus
Sampler: ddim
Negative Prompt: skirt grab, mutated hands and fingers, one hand with more than 5 fingers, one hand with less than 5 fingers, bad eyes, bad face, undefined face, amateur drawing, morphing, error, totem, Stitched, loli, irritated skin, tumor, sample, vector trace, watermark, empty background, disfigured face, cropped, simple background, lowres, bad anatomy, disfigured body, cropped head, gross quality, low quality, terrible quality, worst quality, crap quality, jpeg artifacts, out of focus, poorly drawn face, censorship, mutation, deformed, ugly, blurry
Stable Diffusion model: C:\stable-diffusion-ui\models\stable-diffusion\anythingPonySdIsMagiv1.ckpt.ckpt
VAE model: C:\stable-diffusion-ui\models\vae\vae-ft-mse-840000-ema-pruned
Hypernetwork Model: None
Hypernetwork Strength: None