ComfyUI-ppm

Just a bunch of some random nodes modified/fixed/created by me and/or others. If any node starts throwing errors after an update - try to delete and re-add the node.

You can browse example workflows for FLUX and SDXL NoobAI inside ComfyUI's "Browse Templates/Custom Nodes/ComfyUi-ppm" menu. I'll probably add some more examples in future (but I'm kinda lazy, kek).

Nodes

CLIPNegPip

[!TIP]

See "attention_couple+negpip" or "flux_negpip" from ComfyUI's "Browse Templates" menu.

Allows you to use negative weights in prompts. Negative weights can be used in both CFG models (such as SDXL) and Guidance-Distilled models (such as Flux) to negate a concept or a trait.

Supports:

• SD1
• SDXL
• FLUX
• HunyuanVideo
• HunyuanVideoI2V

Modified implementation of NegPiP by laksjdjf and hako-mikan. It uses ModelPatcher instead of monkey-patching, which should increase compatibility with other nodes.

You can read more about NegPiP in the original repo. When used together with tag-based models, you should keep all commas inside weight braces (i.e. (worst quality,:-1.3) (sketch,:-1.1) instead of (worst quality:-1.3), (sketch:-1.1),).

[!NOTE] CLIPNegPip is compatible with:

• ComfyUI prompt control by asagi4
• Advanced CLIP Text Encode extension by BlenderNeko

CLIPNegPip is incompatible with:

• smZ Nodes by shiimizu (ComfyUI prompt control can replace most of its functionality)
• Comfyui_Flux_Style_Adjust by yichengup (and probably some other custom nodes that modify cond tensors)

AttentionCouplePPM

[!TIP]

See "attention_couple+negpip" and "attention_couple_with_global_prompt" from ComfyUI's "Browse Templates" menu.

Modified implementation of AttentionCouple by laksjdjf and Haoming02, made to be more compatible with other custom nodes.

Inputs for new regions are managed automatically: when you attach cond/mask of a region to the node, a new cond_ / mask_ input appears. Link base_cond input to the positive conditioning used in KSampler/SamplerCustom.

You can use multiple LatentToMaskBB nodes to set bounding boxes for AttentionCouplePPM. The parameters are relative to your initial latent: x=0.5, y=0.0, w=0.5, h=1.0 will produce a mask covering the right half of the image.

You can adjust mask values to set region strength and use ConditioningSetAreaStrength to increase/decrease conditioning strength.

DynSamplerSelect

Modified samplers from Euler-Smea-Dyn-Sampler by Koishi-Star.

Contains some new samplers: euler_ancestral_dy, dpmpp_2m_dy and dpmpp_3m_dy.

Tweaking s_dy_pow may reduce blur artifacts (optimal value is 2 for euler_* samplers and -1 for dpmpp_* samplers, use -1 to disable this feature).

CFG++SamplerSelect

Samplers adapted to CFG++: Manifold-constrained Classifier Free Guidance for Diffusion Models by Chung et al.. Also contains converted samplers from Euler-Smea-Dyn.

Should greatly reduce overexposure effect. Use together with SamplerCustom node. Don't forget to set CFG scale to 1.0-2.0 and PAG/SEG scale (if used) to 0.5-1.0.

Guidance Limiter

Implementation of Applying Guidance in a Limited Interval Improves Sample and Distribution Quality in Diffusion Models by Kynkäänniemi et al. as a post CFG function.

Guidance Limiter is also available as a CFGLimiterGuider guider node for SamplerCustomAdvanced.

Post-CFG nodes

Post-CFG variants of some nodes - they should have increased compatibility with other CFG-related nodes, making it possible to chain them together:

• RescaleCFGPost
• RenormCFGPost
• DynamicThresholdingSimplePost and DynamicThresholdingFullPost (based on sd-dynamic-thresholding by mcmonkey4eva)

Empty Latent Image (Aspect Ratio)

Generates empty latent with specified aspect ratio and with respect to target resolution.

CLIPTextEncodeBREAK

A small lightweight wrapper over ConditioningConcat node. It splits prompts into chunks by BREAK keyword and produces a single concatenated conditioning.

CLIPTokenCounter

Counts tokens in your prompt and returns them as a string. You can use Preview Any node to display them.

Hooks/Hijacks

Schedulers

Adds some schedulers to the default list from ComfyUI by replacing comfy.samplers.calculate_sigmas function:

• ays and ays+ from AlignYourSteps scheduler modified by Extraltodeus - ays is the default AYS scheduler (SDXL variant) and ays+ is just ays with force_sigma_min=True
• ays_30 and gits schedulers based on AYS_32 by Koitenshin
• beta_1_1 - ComfyUI's beta scheduler with both alpha and beta set to 1.0