A small utility for exporting ShaderToy demos to large (print-ready) PNG images. On my MacBookPro, this can export up to 10,000x10,000 px images.
It only features a small set of shaders (those set to
Public + API) and doesn't support cube maps, video inputs, etc.
This tool is experimental and not complete. If you want to help maintain it, let me know.
Install the tool globally with npm.
npm install shadertoy-export -g
More docs to follow.
Basic usage, writes the first frame to process.stdout as PNG.
shadertoy-export shader.frag [opts] > image.png
You can use
-a to grab from the ShaderToy API, which loads demos that are saved as
Public + API. For this, you need to specify a demo ID like
XslGRr, or a URL like https://www.shadertoy.com/view/XslGRr. Example:
shadertoy-export XslGRr --api > image.png
You can use
-o instead of writing to stdout, and
--size to render a different resolution. You can use
--wait to wait N milliseconds before rendering a frame.
shadertoy-export XslGRr --api --output output/1.png --size 1080,768 --wait 1500
You can also enter interactive (GUI) mode with the
-f option. This opens a window which accepts mouse input, and you can hit
Cmd + S or
Ctrl + S at any point to save the image to your output path.
shadertoy-export -f --api --size=512,256 -o images/1.png XslGRr
You can also specify a
-S option to reduce the interactive resolution (does not affect output). For example,
--scale=0.5 will draw the scene at half resolution.
MIT, see LICENSE.md for details.