I have trouble understanding one of the statements in Masaki Kawase's "Real-Time High Dynamic Range Image-Based Lighting" presentation (page 50/51), which you have 5 downscaled buffers and their composition.
Either i don't understand meaning of "downscale",
(since my english not that good, and i am not that familiar with some technical terms) or those level of images aren't downscaled versions of the original image.
What i am saying is, basicaly, if i take original image and downscale using an image editor,
then magnify to original size, i don't get those results. Could you help me to understand what is going on?