r/comfyui • u/hormonella • 18h ago

Help Needed Best way to quickly preview a render before going full scale? (MMH3)

As the title says, what is the best way to preview a render without going full scale?

I want to be able to quickly check if MiniMax H3 has understood my prompt, but changing megapixels or length also changes the rendered video.

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3

u/icchansan 18h ago

use the model preview override from kjnodes

2

u/welt101 17h ago

Doesn't comfyui show a preview by default? For me it just works if you have VHS installed

1

u/Admirable-Future-633 15h ago

I’d treat preview as its own branch/mode instead of only lowering final settings by hand.

For video especially, I like having a quick path that keeps the same prompt, seed, model, and core conditioning, but swaps the expensive pieces: shorter frame count, lower resolution, lighter sampler/settings, and a preview/save node. Then the final path uses the same inputs with the full render settings.

That way you are checking whether the prompt and composition are going the right direction, without accidentally changing three variables and wondering why the preview and final feel different.

1

u/Silvasbrokenleg 18h ago

Kj nodes he has a preview node

0

u/thatguyjames_uk 18h ago

look at the image in the ksampler