Creating a New Node By Rendering To a Texture
Render a portion of the node tree into a new texture.
Overview
You can create a texture from some portion of on-screen content with texture(from:), or its variation, texture(from:crop:). Both of these functions are available for scenes rendered by SKView or WKInterfaceSKScene.
There are a couple reasons you might want to do this, for example:
Creating a new sprite node whose texture reflects prior shading done with SKShader
Flattening a hierarchy of nodes into a texture, either for performance, or to apply some effect. Note that this can also be done using SKEffectNode and setting shouldRasterize to true.
Breaking appart an existing node into separate nodes, for example, for an explosion effect.