Walker in tech tree

core/src/mindustry/async/PhysicsProcess.java

@@ -59,7 +59,7 @@ public class PhysicsProcess implements AsyncProcess{
             PhysicRef ref = entity.physref;
 
             ref.body.layer =
-                entity.type.allowLegStep ? layerLegs :
+                entity.type.allowLegStep && entity.type.legPhysicsLayer ? layerLegs :
                 entity.isGrounded() ? layerGround : layerFlying;
             ref.x = entity.x;
             ref.y = entity.y;