A good overview is in [1]. Curiously, before the classic paper on modeling shutter efficiency [2] came out in 2005, all renderers used in VFX production used b

A good overview is in [1]. Curiously, before the classic paper on modeling shutter efficiency [2] came out in 2005, all renderers used in VFX production used box shutters. I.e. the shutter opens instantly, stays open for the specified duration and then closes instantly. When you watch movies like "Jurassic Park" or "The Mask" and see scenes with extreme motion blur, that's PhotoRealistic RenderMan with a box shutter. The first in-the-wild 1:1 implementation of the parameterization in [2] was done in [3] in the same year the paper came out (hasn't changed until today). It was first used on "Charlotte's Web" (only the spider character done by Rising Sun Pictures has it as they used [3] for it). Pixar added it a few years later too and went a tad overboard with theirs in [4]. Most offline renderers nowadays have this feature and call it a "shutter curve". [1] O. Navarro et al.: Motion Blur Rendering: State of the Art (https://citeseerx.ist.psu.edu/doc_view/pid/fc23fb525cafa8fe68ec84c1eadf85e30090a774 https://citeseerx.ist.psu.edu/doc_view/pid/fc23fb525cafa8fe6...) [2] Stephenson, Ian: Improving Motion Blur: Shutter Efficiency and Temporal Sampling (https://staffprofiles.bournemouth.ac.uk/display/journal-article/5221 https://staffprofiles.bournemouth.ac.uk/display/journal-arti...) [3] https://www.3delight.com/ https://www.3delight.com/, see specifically https://nsi.readthedocs.io/en/latest/nodes.html https://nsi.readthedocs.io/en/latest/nodes.html [4] https://renderman.pixar.com/resources/RenderMan_20/cameramodel.html#the-shutter-model https://renderman.pixar.com/resources/RenderMan_20/cameramod...