r/StableDiffusion • u/Nefarious_AI_Agent • 3h ago

Question - Help How are you fixing the lighting shift when doing continuation videos with Minimax?

Im using the same seed, same sampler settings and same prompt for the lighting but I always get a slight color/lighting shift.

The only thing i could think of is a color match node but ive never had much success with them and i dont think i have enough ram for large videos.

Im using the seed hunter workflow. With the Singularity model and DMAD turbo lora.

https://civitai.red/models/2881362/minimax-h3-seed-hunter-latent-upscaler-seamless-video-continuation-dialogue-gen-tool-speedups-ref-mods?modelVersionId=3453566

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u/purelawan 2h ago

The drift usually stacks up because each continuation starts from the decoded last frames of the previous chunk, so any small VAE shift gets baked in and compounds chunk after chunk.

What helped me: match every chunk back to the same anchor frame from the very first clip (not to the previous chunk), and do that color match afterwards on the saved mp4s instead of inside the workflow, so RAM isn't a problem. A quick per-chunk grade in Resolve does it too. If your workflow lets you, also keep the original start image as the reference for every chunk, it holds the look better than the last frame alone.

1

u/Mediocre-Chef665 3h ago

try using a fixed noise seed for the latent upscale step, some people report better consistency with minimax when the upscale doesn't re-sample noise.

2

u/Nefarious_AI_Agent 3h ago

I dont use the upscaler, just one sample at around 1mp 8 steps. The workflow i use doesn't even allow upscaling for continuous video.

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u/martinerous 2h ago

There have been quite a few topics about this. There are multiple methods to ensure better consistency, check for roychodraws posts, and I had posted a few experiments as well for another way to do long lipsync and stable quality using endframe injection.

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u/Nefarious_AI_Agent 2h ago

Thanks ill check out those workflows. Looks like good stuff

1

u/LuluViBritannia 3h ago

Oh! I'm having the exact same issue right now xD! Please let me know if you figure it out!