ChromaRadianceOptions - ComfyUI Built-in Node Documentation

Complete documentation for the ChromaRadianceOptions node in ComfyUI. Learn its inputs, outputs, parameters and usage.

The ChromaRadianceOptions node allows you to configure advanced settings for the Chroma Radiance model. It wraps an existing model and applies specific options during the denoising process based on sigma values, enabling fine-tuned control over NeRF tile size and other radiance-related parameters.

Inputs

Parameter	Description	Data Type	Required	Range
model	The model to apply Chroma Radiance options to	MODEL	Yes	-
preserve_wrapper	When enabled, will delegate to an existing model function wrapper if it exists. Generally should be left enabled. (default: True)	BOOLEAN	No	-
start_sigma	First sigma that these options will be in effect. (default: 1.0)	FLOAT	No	0.0 to 1.0
end_sigma	Last sigma that these options will be in effect. (default: 0.0)	FLOAT	No	0.0 to 1.0
nerf_tile_size	Allows overriding the default NeRF tile size. -1 means use the default (32). 0 means use non-tiling mode (may require a lot of VRAM). (default: -1)	INT	No	-1 and above
force_sequential_txt_ids	Force usage of sequential text token IDs instead of zeroes. Should be used for checkpoints from 2026-05-22 to 2026-06-01 that are trained in this way but do not contain the sequential key in the state dict. (default: False)	BOOLEAN	No	-

Note: The Chroma Radiance options only take effect when the current sigma value falls between end_sigma and start_sigma (inclusive). The nerf_tile_size parameter is only applied when set to 0 or higher values. The force_sequential_txt_ids parameter is only applied when set to True.

Outputs

Output Name	Description	Data Type
model	The modified model with Chroma Radiance options applied	MODEL

This documentation was AI-generated. If you find any errors or have suggestions for improvement, please feel free to contribute! Edit on GitHub

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