Maintainer: zsxkib

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Last updated 5/19/2024
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Model overview

ic-light is an AI model developed by zsxkib that can automatically relight images. It can manipulate the illumination of images, including adjusting the lighting conditions, adding shadows, and creating different moods and atmospheres. The model is capable of producing highly consistent relight results, even to the point of being able to estimate normal maps from the relighting. This consistency is achieved through a novel technique called "Imposing Consistent Light" which ensures that the blending of different light sources is mathematically equivalent to the appearance with mixed light sources.

The ic-light model is similar to other image editing and enhancement models like GFPGAN, which focuses on face restoration, and LedNet, which handles joint low-light enhancement and deblurring. However, ic-light is specifically designed for relighting images, allowing users to adjust the lighting conditions in creative ways.

Model inputs and outputs


  • Prompt: A text description guiding the relighting and generation process
  • Subject Image: The main foreground image to be relighted
  • Lighting Preference: The type and position of lighting to apply to the initial background latent
  • Various hyperparameters: Including number of steps, image size, denoising strength, etc.


  • Relighted Images: The generated images with the desired lighting conditions applied


The ic-light model can automatically relight images based on textual prompts and lighting preferences. It can add shadows, adjust the mood and atmosphere, and create cinematic lighting effects. The model's ability to maintain consistent lighting across different relighting conditions is a key strength, allowing users to experiment and iterate on the lighting without losing coherence.

What can I use it for?

ic-light can be used for a variety of image editing and enhancement tasks, such as:

  • Enhancing portrait photography by adjusting the lighting to create a more flattering or artistic look
  • Generating stylized images with specific lighting conditions, such as warm, moody bedroom scenes or bright, sunny outdoor settings
  • Adjusting the lighting in product or architectural photography to better showcase the subject
  • Experimenting with different lighting setups for CGI or 3D rendering projects

The model's consistent relighting capabilities also make it useful for tasks like normal map estimation, which can be leveraged in 3D modeling and game development workflows.

Things to try

One interesting aspect of ic-light is its ability to generate normal maps from the relighting results, despite not being trained on any normal map data. This suggests the model has learned to maintain a consistent 3D lighting representation, which could be useful for a variety of applications beyond just image editing.

Another interesting feature is the background-conditioned model, which allows for simple prompting without the need for careful text guidance. This could be useful for users who want to quickly generate relighted images without the overhead of fine-tuning the prompts.

Overall, ic-light is a powerful tool for creative image manipulation and lighting experimentation, with potential applications in photography, digital art, and 3D modeling.

This summary was produced with help from an AI and may contain inaccuracies - check out the links to read the original source documents!

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