Skip to main content

An engine for real-time manipulation of visual stimuli for neuroscience, implemented via GPU shaders

Project description

Shady is a general-purpose visual stimulus toolbox filling a similar role to Psychtoolbox, VisionEgg, or PsychoPy. It is for programmers who work in neuroscience, especially vision science, and addresses their need for high timing precision, linearity, high dynamic range, and pixel-for-pixel accuracy.

It takes its name from its heavy reliance on a shader program to perform parallel pixel processing on a computer’s graphics processor. It was designed with an emphasis on performance robustness in multi-tasking applications under unforgiving conditions. For optimal timing performance, the CPU drawing management commands are carried out by a compiled binary engine.

See for full documentation and installation instructions.

If you use Shady in your work, please cite:

  • Hill NJ, Mooney SWJ, Ryklin EB & Prusky GT (2019). Shady: a Software Engine for Real-Time Visual Stimulus Manipulation. Journal of Neuroscience Methods 320: 79-86.

        author  = {Hill, N. Jeremy  and  Mooney, Scott W. J.  and  Ryklin, Edward B.  and  Prusky, Glen T.},
        title   = {{Shady}: a Software Engine for Real-Time Visual Stimulus Manipulation},
        journal = {Journal of Neuroscience Methods},
        volume  = {320},
        number  = {C},
        pages   = {79--86},
        month   = {May},
        year    = {2019},
        date    = {2019-05-15},
        doi     = {10.1016/j.jneumeth.2019.03.020},
        url     = {},

Project details

Download files

Download the file for your platform. If you're not sure which to choose, learn more about installing packages.

Files for Shady, version 1.13.1
Filename, size File type Python version Upload date Hashes
Filename, size Shady-1.13.1-py2.py3-none-any.whl (8.3 MB) File type Wheel Python version py2.py3 Upload date Hashes View

Supported by

AWS AWS Cloud computing Datadog Datadog Monitoring Facebook / Instagram Facebook / Instagram PSF Sponsor Fastly Fastly CDN Google Google Object Storage and Download Analytics Huawei Huawei PSF Sponsor Microsoft Microsoft PSF Sponsor NVIDIA NVIDIA PSF Sponsor Pingdom Pingdom Monitoring Salesforce Salesforce PSF Sponsor Sentry Sentry Error logging StatusPage StatusPage Status page