Liquify .msh file format specifications

The structure of a .MSH file is this:

uint32: version

ASCII string: "yfqLhseM"

uint32: 2

uint32: width

uint32: height

And the rest is the data. If version=2, the data is just 32-bit floats. If version=3, the zeros are RLE-compressed. That is how I implemented it in my photo editor https://www.Photopea.com 🙂 

When you apply (Press OK) from the Liquify menu, Scriping Listener Plugin dumps the mesh into a CSV string (search for "String.fromCharCode" in the log file your Photoshop creates).

ScriptingListenerplugin 

It will look something like this, but a lot longer:

// =======================================================
var idsetd = charIDToTypeID( "setd" );
    var desc65 = new ActionDescriptor();
    var idnull = charIDToTypeID( "null" );
        var ref19 = new ActionReference();
        var idfilterFX = stringIDToTypeID( "filterFX" );
        ref19.putIndex( idfilterFX, 1 );
        var idLyr = charIDToTypeID( "Lyr " );
        var idOrdn = charIDToTypeID( "Ordn" );
        var idTrgt = charIDToTypeID( "Trgt" );
        ref19.putEnumerated( idLyr, idOrdn, idTrgt );
    desc65.putReference( idnull, ref19 );
    var idfilterFX = stringIDToTypeID( "filterFX" );
        var desc66 = new ActionDescriptor();
        var idFltr = charIDToTypeID( "Fltr" );
            var desc67 = new ActionDescriptor();
            var idLqMe = charIDToTypeID( "LqMe" );
            desc67.putData( idLqMe, String.fromCharCode( 0, 0, 0, 4, 121, 102, 113, 76, 0, 0 ) );
        var idLqFy = charIDToTypeID( "LqFy" );
        desc66.putObject( idFltr, idLqFy, desc67 );
    var idfilterFX = stringIDToTypeID( "filterFX" );
    desc65.putObject( idfilterFX, idfilterFX, desc66 );
executeAction( idsetd, desc65, DialogModes.NO );

Hey @nickevans74, hope all is well.

Did you ever get any further info on .msh files? I'm trying to import a .msh file, created in the liquify tool, into Photoshop 3D (CC 19.1.5).

I found a clue left by here: Re: Is it worth it for me to learn scripting in PS? (It's at the end of the post.) I still haven't been able to get it to read the file.  There is almost no documentation about these files. I've searched for converters as well and have not had any luck. Any tips?

Thanks, ~Joe D