Advanced features

These pages cover what MistWarp does beyond the Scratch editor: how projects are compiled, how to share data between players, how to control a project from its URL or an embed, and the runtime options that remove Scratch's limits.

Projects and the web

• JavaScript and the compiler explains how blocks become JavaScript, and how to run your own code.
• Cloud variables share values between everyone playing the same project.
• URL parameters set options such as FPS, stage size or username from the link.
• Embedding puts a project on another website with an iframe.
• Unshared projects explains why unshared Scratch projects cannot be opened.
• CORS explains why a fetch or networking block can fail even after you allow it.

Runtime options

Each of these is a setting in the editor settings, and most also have a URL parameter. The packager offers the same options.

Option	What it changes
Custom FPS	How many times per second scripts run (Scratch uses 30).
Interpolation	Smooths motion by drawing in-between frames, without speeding scripts up.
Custom stage size	The stage dimensions, instead of 480x360.
High quality pen	Draws the pen layer at the stage's real resolution.
Warp timer	Stops long loops in warp mode from freezing the project.
Infinite clones	Removes the 300 clone limit.
Remove fencing	Lets sprites leave the stage and grow or shrink without limit.
Remove miscellaneous limits	Lifts smaller limits, such as the pitch effect range and pen size.
Disable compiler	Interprets blocks one at a time, like Scratch.