Does anyone know what exactly all of the properties for the <Material>s in materials.cfg?
    <Material
        Name = "Dyn_Paper"
        Elasticity = "0.25"
        KineticFriction = "0.25"
        StaticFriction = "0.3"
        
        Priority="2"
        
        ElasticityMode = "Min"
        FrictionMode = "Min"
        
        StepType="generic_hard"
        
        MinScrapeSpeed = "1"
        MinScrapeFreq = "0.9"
        MinScrapeFreqSpeed = "1.2"
        MaxScrapeFreq = "1.1"
        MaxScrapeFreqSpeed = "2.2"
        MiddleScrapeSpeed = "2"
        MinScrapeContacts = "3"
        ScrapeSoundName = "scrape_paper"
    >
Some of it, such as the friction options are self explanatory, but what exactly is for instance "MiddleScrapeSpeed" or "Priority"?