Music

PROSTOtv

Artist: Pokój z Widokiem na Wojnę, Sokół, Marysia Starosta Title: Pokój z widokiem na wojnę Lyrics: Juras, Koras, Sokół Producer: Fate

Nonprofits & Activism

TheElMoIsEviL

Source: http://cgvi.uscg.mil/media/main.php?g2_itemId=863072

People & Blogs

TheIllusioncontest

Finalist of the 2010 Best Illusion of the Year Contest by Maarten Wijntjes & Sylvia Pont The movie shows a Brownian surface (which has a fractal structure, but this does not seem to be important for the illusion). The appearance seems to change between matte and glossy, as the ruler illustrates. However, the surface is continuously rendered with matte (Lambertian) reflectance. What is happening is that the height of the surface is stretched in the viewing direction. The illumination direction is transformed together with the stretching to keep the cast shadows constant. This combined transformation of the light and surface height results in an illusory gloss. We initially though that the effect could be attributed to a luminance histogram skew transformation, but this seems not the case. A simple version of the current explanation is that stretching a surface together with the light direction (the so-called Bas-Relief transformation), induces illusory highlights due to darkening at points where the surface normal points away from the optical axis.