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BloomEffect

What is it?

The BloomEffect node applies a beautiful bloom or glow effect to your images, creating dreamy, ethereal results. It simulates the way bright light sources create a soft, luminous halo around them, adding a magical quality to your images.

When would I use it?

Use this node when you want to:

  • Create dreamy, ethereal image effects
  • Add a soft glow around bright areas
  • Enhance the magical quality of fantasy or sci-fi images
  • Create romantic or atmospheric lighting effects
  • Add visual interest to portraits or landscapes
  • Simulate lens flare or light bloom effects
  • Enhance the mood and atmosphere of your images

How to use it

Basic Setup

  1. Add the BloomEffect node to your workflow
  2. Connect an image source to the "input_image" input
  3. Adjust the bloom amount and radius sliders
  4. The processed image will be available at the "output" parameter

Parameters

Bloom Settings

  • bloom_amount (0.0-2.0, default: 0.5): Controls the intensity of the bloom effect

    • 0.0 = no bloom effect
    • Higher values create more intense glow
    • 2.0 = maximum bloom intensity

  • bloom_radius (1-20, default: 5): Controls the size of the bloom effect

    • Lower values create tighter, more focused glow
    • Higher values create larger, more diffuse glow
    • Larger radius values take longer to process

Outputs

  • output: The image with the bloom effect applied

Example

A typical bloom effect workflow:

  1. Load or generate an image using LoadImage or GenerateImage
  2. Connect that image to the BloomEffect node's "input_image" parameter
  3. Adjust the bloom settings:
    • Set bloom_amount to 0.8 for a moderate glow effect
    • Set bloom_radius to 8 for a medium-sized bloom
  4. Connect the "output" to DisplayImage to view the result

Important Notes

  • Live Preview: Changes are applied in real-time as you move the sliders
  • Processing Time: Larger radius values take longer to process
  • Best Results: Works best on images with bright areas or light sources
  • RGBA Support: The node preserves transparency in RGBA images

Common Issues

  • No Visible Effect: Make sure bloom_amount is greater than 0
  • Too Subtle: Increase bloom_amount for more visible effect
  • Too Strong: Decrease bloom_amount for more subtle effect
  • Slow Processing: Reduce bloom_radius for faster processing

Technical Details

The bloom effect is created by:

  1. Brightness Detection: Identifying bright areas in the image
  2. Gaussian Blur: Applying blur to create the glow effect
  3. Blending: Combining the original image with the blurred version
  4. Intensity Control: Scaling the effect based on bloom_amount

This creates a realistic bloom effect similar to what you'd see in professional photography or film.