ComfyUI-Prediction-Boost

Modify noise prediction to make image brighter on Stable Diffusion. This is a custom node for ComfyUI.

Method

We use xₜ⊥Ɛ̃(the vector component of xₜ perpendicular to Ɛ̃) to boost up the image part of xₜ by this:

Ɛ̃ ← Ɛ̃ - boost_scale * (xₜ⊥Ɛ̃)

Result

• model: Animagine XL V3.1https://civitai.com/models/260267/animagine-xl-v31

• seed: 42

• steps: 20

• cfg: 5.0

• sampler: uni_pc

• scheduler: normal

• negative prompt: flat design, early sketch, PTSD, stain, signature

• prompt: original, "the aquarium girl"

prompt: original, "the aquarium girl"

boost=0.0
boost=0.15

prompt: original, "the rainy days"

boost=0.0
boost=0.15

prompt: original, "botanical cafe"

boost=0.0
boost=0.15

prompt: original, "across the shore"

boost=0.0
boost=0.15

prompt: original, "the two of us"

boost=0.0
boost=0.15