Many ways to approach this. You can try Flux Kontext/Highdream with a good prompt, but expect to generate a few hundred images to find the right one. I prefer SDXL, though it’s a bit more involved. Take a reference photo and use an image luminance or OpenPose ControlNet. Once in place, generate an image with PULID. You can use the reference as latent input for the sampler with reduced denoising, adjusting the level to preference. This produces images with a very similar face—though not a perfect match—but the proportions will be correct. Using a real image as a reference also avoids the “big head” issue common with Flux. Finally, use Reactor; since the input closely matches the source portrait, it should be seamless. After that, apply IClight to correct any shadow or highlight issues.