Description:

Tone mapping is the basically the process of increasing the contrast of dark images and decreasing the contrast of light images. The goal is to make the images look more realistic in the same way that photographers do when they develop pictures differently depending on the lighting. Tone mapping is implemented by finding the log average of all of the RGB values for a rendered scene and then using a few simple equations to scale all RGB colors in relation to the log average.

This image was generated without tone mapping. I used 512 samples per pixel with dimesions of 512x512 pixels. The emissiveness of the light is 4.0.

This image was generated using tone mapping with alpha = 0.2. I used 512 samples per pixel with dimesions of 512x512 pixels. The emissiveness of the light is 10.0.

This image was generated using tone mapping with alpha = 0.5. I used 512 samples per pixel with dimesions of 512x512 pixels. The emissiveness of the light is 10.0.

This image was generated using tone mapping with alpha = 0.7. I used 512 samples per pixel with dimesions of 512x512 pixels. The emissiveness of the light is 10.0.