本帖最后由 schneehertz 于 2022-10-16 17:28 编辑
测试一下各个Sampler生成图片的速度和收敛位置，主要为了确定在不同场景如何选取合适的Sampler和Steps
首先对所有的Sampler做一遍Steps 5-200的生成，固定除了这两个参数之外的其他参数
这里说明一下Heun, DPM2, DPM2 a, DPM2 Karras, DPM2 a Karras这几个Sampler的速度是其余Sampler的1/2左右
可以看出来:
1. Euler, Euler a, Heun, DPM2 Karras, DDIM这几个Sample在20steps就完成了收敛
2. Sampler中带a字样的在增加Step时，细节变动比不带a字样的大
3. 没有Sampler在高Steps时有优势
接着对Euler, Euler a, Heun, DPM2 Karras, DDIM这几个效果比较好的Sampler跑一遍10-20的生成
可以看到这几个Sampler都在16-18steps收敛，差距不大，结合速度来看，Euler，Euler a，DDIM是比较合适的选择
结论：
txt2img的场合，可以选Euler，Euler a，DDIM，Steps设为20
img2img的场合，如果需要微调细节，建议选Eular a，然后多试几个Steps
附上原图和Prompt及其他参数
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((masterpiece)), (((Katou Megumi))), (Bob cut), best quality, cinematic postprocessing lens flare, absurdres detailed, highly detailed, extremely detailed, highly intricate, extremely intricate, 1girl, dark brown eyes, beautiful detailed eyes, bangs, texturized bangs with layers, dark brown hair, texturized hair with layers, messy hair, hair ornament, blurry, blurry background, blurry foreground, blush, city lights, depth of field, festival, fireworks, aerial fireworks, galax, japanese clothes, kimono, floral print, light particles, long sleeves, looking at viewer, milky way, night, night sky, obi, outdoors, sash, shooting star, sitting, sky, aurora, space, sparkler, star (sky), starry sky, starry sky print, summer festival
Negative prompt: multiple breasts, (mutated hands and fingers:1.5 ), (long body :1.3), (mutation, poorly drawn :1.2) , black-white, bad anatomy, liquid body, liquid tongue, disfigured, malformed, mutated, anatomical nonsense, text font ui, error, malformed hands, long neck, blurred, lowers, lowres, bad anatomy, bad proportions, bad shadow, uncoordinated body, unnatural body, fused breasts, bad breasts, huge breasts, poorly drawn breasts, extra breasts, liquid breasts, heavy breasts, missing breasts, huge haunch, huge thighs, huge calf, bad hands, fused hand, missing hand, disappearing arms, disappearing thigh, disappearing calf, disappearing legs, fused ears, bad ears, poorly drawn ears, extra ears, liquid ears, heavy ears, missing ears, fused animal ears, bad animal ears, poorly drawn animal ears, extra animal ears, liquid animal ears, heavy animal ears, missing animal ears, text, ui, error, missing fingers, missing limb, fused fingers, one hand with more than 5 fingers, one hand with less than 5 fingers, one hand with more than 5 digit, one hand with less than 5 digit, extra digit, fewer digits, fused digit, missing digit, bad digit, liquid digit, colorful tongue, black tongue, cropped, watermark, username, blurry, JPEG artifacts, signature, 3D, 3D game, 3D game scene, 3D character, malformed feet, extra feet, bad feet, poorly drawn feet, fused feet, missing feet, extra shoes, bad shoes, fused shoes, more than two shoes, poorly drawn shoes, bad gloves, poorly drawn gloves, fused gloves, bad cum, poorly drawn cum, fused cum, bad hairs, poorly drawn hairs, fused hairs, big muscles, ugly, bad face, fused face, poorly drawn face, cloned face, big face, long face, bad eyes, fused eyes poorly drawn eyes, extra eyes, malformed limbs, more than 2 nipples, missing nipples, different nipples, fused nipples, bad nipples, poorly drawn nipples, black nipples, colorful nipples, gross proportions. short arm, (((missing arms))), missing thighs, missing calf, missing legs, mutation, duplicate, morbid, mutilated, poorly drawn hands, more than 1 left hand, more than 1 right hand, deformed, (blurry), disfigured, missing legs, extra arms, extra thighs, more than 2 thighs, extra calf, fused calf, extra legs, bad knee, extra knee, more than 2 legs, bad tails, bad mouth, fused mouth, poorly drawn mouth, bad tongue, tongue within mouth, too long tongue, black tongue, big mouth, cracked mouth, bad mouth, dirty face, dirty teeth, dirty pantie, fused pantie, poorly drawn pantie, fused cloth, poorly drawn cloth, bad pantie, yellow teeth, thick lips, bad cameltoe, colorful cameltoe, bad asshole, poorly drawn asshole, fused asshole, missing asshole, bad anus, bad pussy, bad crotch, bad crotch seam, fused anus, fused pussy, fused anus, fused crotch, poorly drawn crotch, fused seam, poorly drawn anus, poorly drawn pussy, poorly drawn crotch, poorly drawn crotch seam, bad thigh gap, missing thigh gap, fused thigh gap, liquid thigh gap, poorly drawn thigh gap, poorly drawn anus, bad collarbone, fused collarbone, missing collarbone, liquid collarbone, strong girl, obesity, worst quality, low quality, normal quality, liquid tentacles, bad tentacles, poorly drawn tentacles, split tentacles, fused tentacles, missing clit, bad clit, fused clit, colorful clit, black clit, liquid clit, QR code, bar code, censored, safety panties, safety knickers, beard, furry ,pony, pubic hair, mosaic, excrement, faces, shit, futa, testis
CFG scale: 11, Seed: 478883955, Size: 768x512, Model hash: 1d4a34af, Eta: 0.67, Clip skip: 2
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发表于 2022-10-16 14:04
真是吃亏
是我咒语不对吗,一般20步才刚成人形
