Mickey

> * Running the `... premake5 gmake2 ...` command fails with `Error: ...renderer/submodules/rive-cpp/build/rive_build_config.lua:323: attempts to concatenate a nil value (global 'iphoneos_sysroot')`. I'm not familiar enough with Lua/premake but it seems...

> Where can we look at this multiply blend behaviour? (in other renderers or a guide somewhere? ) The "guideline" which I refers to is https://en.wikipedia.org/wiki/Blend_modes#Multiply. In After Effects, I...

In threejs, the formula is `[gl.ZERO, gl.SRC_COLOR, gl.ZERO, gl.SRC_ALPHA]`. It is the same as `[gl.DST_COLOR, gl.ZERO, gl.DST_ALPHA, gl.ZERO]` https://github.com/mrdoob/three.js/blob/dev/src/renderers/webgl/WebGLState.js#L669

> 1. AF does not use porter-duff variant of multiply. > 2. I don't see on wiki what is alpha compositing for multiply > > I believe we need two...