C

HDR Bloom Tonemap

Using HDRBloomTonemap

The "HDRBloomTonemap" effect provides two features:

  1. Adjust the gamma and exposure of the high-dynamic range rendered content to achieve the image quality you want, and
  2. Apply an adjustable 'bloom' effect to very bright areas (like the sun glinting off a car).

When you add an HDRBloomTonemap effect to a layer, the following properties are available in the Inspector palette:

  • Gamma - this affects the non-linear curve of the lighting. Higher values will increase the exposure of mid tones, lightening the image (and decreasing the contrast). A value of 1.0 causes no adjustment to the image.
  • Exposure - this is a linear multiplier on the lighting, brightening or darkening the image overall. A value of 0.0 causes no adjustment to the image.
  • Bloom Threshold - lighting greater than this value will bloom. A value of 1.0 corresponds to white in the original render result. Lowering this value will cause more areas of the rendered scene to bloom; at a value of 0.0 everything in the scene will bloom.
    • Tip: to disable bloom and use only the tone mapping, set this to a sufficiently high value, like 999.
  • Bloom Falloff - adjusts the amount of bloom. Lower values result in stronger bloom effect; higher values make the effect more subtle.

Available under certain Qt licenses.
Find out more.