diff --git a/source/core/actorlist.cpp b/source/core/actorlist.cpp
index 43f5e58a2..539564fd2 100644
--- a/source/core/actorlist.cpp
+++ b/source/core/actorlist.cpp
@@ -549,6 +549,7 @@ DEFINE_FIELD_NAMED(DCoreActor, sprext.alpha, alpha)
 DEFINE_FIELD_NAMED(DCoreActor, time, spawnindex)
 DEFINE_FIELD_NAMED(DCoreActor, spritesetindex, spritesetpic)
 DEFINE_FIELD_NAMED(DCoreActor, spr.angle, angle)
+DEFINE_FIELD(DCoreActor, vel)
 
 void coreactor_setpos(DCoreActor* self, double x, double y, double z, int relink)
 {
@@ -633,3 +634,34 @@ DEFINE_ACTION_FUNCTION_NATIVE(DCoreActor, backuppos, coreactor_backuppos)
 	return 0;
 }
 
+void coreactor_setposition(DCoreActor* self, double x, double y, double z)
+{
+	SetActor(self, DVector3(x, y, z));
+}
+
+DEFINE_ACTION_FUNCTION_NATIVE(DCoreActor, setposition, coreactor_setposition)
+{
+	PARAM_SELF_PROLOGUE(DCoreActor);
+	PARAM_FLOAT(x);
+	PARAM_FLOAT(y);
+	PARAM_FLOAT(z);
+	coreactor_setposition(self, x, y, z);
+	return 0;
+}
+
+void coreactor_setpositionz(DCoreActor* self, double x, double y, double z)
+{
+	SetActorZ(self, DVector3(x, y, z));
+}
+
+DEFINE_ACTION_FUNCTION_NATIVE(DCoreActor, setpositionz, coreactor_setpositionz)
+{
+	PARAM_SELF_PROLOGUE(DCoreActor);
+	PARAM_FLOAT(x);
+	PARAM_FLOAT(y);
+	PARAM_FLOAT(z);
+	coreactor_setpositionz(self, x, y, z);
+	return 0;
+}
+
+
diff --git a/wadsrc/static/zscript/coreactor.zs b/wadsrc/static/zscript/coreactor.zs
index 1106ba0aa..37fcaf667 100644
--- a/wadsrc/static/zscript/coreactor.zs
+++ b/wadsrc/static/zscript/coreactor.zs
@@ -1,4 +1,10 @@
 
+enum EClipMask
+{
+	CLIPMASK0 = (1 << 16) + 1,
+	CLIPMASK1 = (256 << 16) + 64
+};
+
 class CoreActor native
 {
 	native readonly sectortype sectp;
@@ -32,6 +38,7 @@ class CoreActor native
 	native float alpha;
 	native double clipdist;
 	native double angle;
+	native Vector3 vel;
 
 	native readonly int16 spritesetpic;
 	native readonly int spawnindex;
@@ -41,5 +48,7 @@ class CoreActor native
 	native void move(Vector3 newpos, bool relink = true);
 	native void setSpritePic(int index);	// index into actor's spriteset.
 	native void backuppos();
+	native void setPosition(Vector3 pos);
+	native void setPositionZ(Vector3 pos);
 }