![]() As the White Level parameter increases, brightness that approaches the highlight range is compressed. The dashed line is a linear mapping: the image is not changed. ![]() The tone-mapping curve depends on the White Level adjustment, as shown by the sample curves for the tone mapper depicted below. ![]() Lighting in this scene is very simple: a directional light and an indirect HDR skylight Math's boring, feel free to skip this section BTW, "energy diffusion" is the fancy term for Fast Blur. This energy diffusion step is important to preserve the illusion of really bright spots in the images (as explained in "High Dynamic Range Imaging" by Reinhard, Ward et al.). The remaining ten percent is a bit of color correction - a blurred layer added to the original - used to create an halo around the highlights. Ninety percent of the final look is created by the Simple Tone Mapper plugin. Here's the complete animation, a real quick render that uses just a direction light and a sky.
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