ComfyUI-LatentDetailer

<p align="center"> <img src="https://github.com/user-attachments/assets/2ece32c1-fa64-46ec-9921-8181b200d6dd" width=500> </p>

(Formerly ComfyUI-SpectralVAEDetailer)

A node for ComfyUI that adjusts a latent image before the VAE decoding step in order to improve your image quality.

It performs a fast latent-space “detail pass”: runs one (or more) extra UNet evaluation(s) at configurable sigma positions, then reinjects controlled high-frequency structure + optional CFG delta, with lightweight post-ops (micrograin, bloom/halation, color drift, chroma controls).

Also published on the Comfy Registry (search for “LatentDetailer”).

View the related thread on Reddit for demo images.

[!TIP] If the effect is too strong, please check the example_workflows folder for recommended presets!

What it does (high level)

1. Computes a denoised estimate from the current latent using UNet at one or more sigma positions (sigmas).
2. Extracts / boosts high-frequency structure and reinjects it into the latent (with optional “protect lows” logic).
3. Optionally injects a guidance-delta term (CFG delta) to ensure guidance has a visible impact in this stage.
4. Optional finishing:
   • micrograin injection
   • bloom / halation approximation (luma-only)
   • color drift
   • chromatic aberration (spatial chroma misregistration)

Key inputs

sigmas (STRING)

Comma-delimited list of normalized sigma positions in [0..1].
Each entry triggers one UNet eval; results are averaged.

• 0.0 = early/noisy (largest sigma)
• 1.0 = late/clean (smallest sigma)

Examples:

• 0.40 (default)
• 0.25,0.55

Hi-res fix

• hires_scale (FLOAT, 1.0–4.0): fractional allowed (e.g. 1.5)
• hires_strength: how much of the hi-res residual is applied back at 1x
• hires_use_importance_mask + hires_mask_strength: focuses work where the base latent has more structure

Detail / structure

• detail_strength, hf_radius, protect_lows: primary detail reinjection controls
• mid_strength: optional mid-frequency shaping

Chroma controls

• detail_chroma: scales how strongly detail + CFG injections affect chroma latent channels (1..3).
• chromatic_aberration: lens-like spatial misregistration applied to chroma channels (1..3) after all other adjustments. Keep subtle (typically ~0.02–0.10).

Bloom / halation

• bloom_strength: spreads bright luma highlights (channel 0) into a soft glow
• bloom_threshold: highlight threshold
• bloom_radius: blur radius (bigger = softer, slower)

Grain

• noise_scale, noise_radius, noise_flat_suppress: micrograin injection controls
• grain_luma: modulates grain by luma (more in shadows, less in highlights)

Notes

This node is intentionally speed-oriented: by default, it adds only one extra UNet pass plus lightweight tensor ops.

It’s primarily tuned for SDXL photoreal workflows, but can be experimented with on other latent diffusion models.