qzdoom/wadsrc/static/zscript/shared/morph.txt

class MorphProjectile : Actor native
{
	Default
	{
		Damage 1;
		Projectile;
		-ACTIVATEIMPACT
		-ACTIVATEPCROSS
	}
}

class MorphedMonster : Actor native
{
	Default
	{
		Monster;
		-COUNTKILL
		+FLOORCLIP
	}
}