diff --git a/src/npc/move.ts b/src/npc/move.ts
index a1b73e0..29e2670 100644
--- a/src/npc/move.ts
+++ b/src/npc/move.ts
@@ -1,4 +1,4 @@
-import { NPCState } from '../utils/types'
+import { NPCLerpType, NPCState } from '../utils/types'
 import { NPC } from './npc'
 
 @Component('npclerpData')
@@ -10,10 +10,12 @@ export class NPCLerpData {
   totalDuration: number = 0
   speed: number[] = []
   loop: boolean = false
+  type: NPCLerpType = NPCLerpType.SMOOTH_PATH //default
   onFinishCallback?: () => void
   onReachedPointCallback?: () => void
-  constructor(path: Vector3[]) {
+  constructor(path: Vector3[],type:NPCLerpType=NPCLerpType.SMOOTH_PATH) {
     this.path = path
+    if(type !== undefined) this.type = type
     NPCWalkSystem.createAndAddToEngine()
   }
 
@@ -31,37 +33,87 @@ export class NPCWalkSystem implements ISystem {
   update(dt: number) {
     for (let npcE of walkingNPCGroup.entities) {
       const npc = (npcE as NPC)
+      //try{
       if (npc.state == NPCState.FOLLOWPATH) {
         let transform = npc.getComponent(Transform)
         let path = npc.getComponent(NPCLerpData)
-        if (path.fraction < 1) {
+
+        if(path.type !== undefined && path.type == NPCLerpType.SMOOTH_PATH){
+          //stop exactly at each point
+          if (path.fraction < 1) {
+            path.fraction += dt * path.speed[path.origin]
+
+            //if fraction goes over 1 push it back to 1?
+
+            transform.position = Vector3.Lerp(
+              path.path[path.origin],
+              path.path[path.target],
+              path.fraction
+            )
+          } else {
+            path.origin = path.target
+            path.target += 1
+            if (path.target >= path.path.length) {
+              if (path.loop) {
+                path.target = 0
+              } else {
+                npc.stopWalking()
+                if (path.onFinishCallback) {
+                  path.onFinishCallback()
+                }
+                path.fraction = 1
+                return
+              }
+            } else if (path.onReachedPointCallback) {
+              path.onReachedPointCallback()
+            }
+            path.fraction = 0 //starts on this point
+            transform.lookAt(path.path[path.target])
+          }
+        }else{
+          //default follow, smooth but with low FPS could cut corners
+          //always increment fraction
           path.fraction += dt * path.speed[path.origin]
+
+          if(path.fraction >= 1){
+            path.origin = path.target
+            const tartInc = Math.max(1,Math.floor( path.fraction ))
+            path.target += tartInc
+            if (path.target >= path.path.length) {
+              if (path.loop) {
+                path.target = 0
+              } else {
+                //path.target = path.path.length - 1
+                npc.stopWalking()
+                if (path.onFinishCallback) {
+                  path.onFinishCallback()
+                }
+                path.fraction = 1
+                return
+              }
+            } else if (path.onReachedPointCallback) {
+              path.onReachedPointCallback()
+            }
+            path.fraction -= tartInc
+            //TODO consider lerping look at
+            if (path.target < path.path.length) {
+              transform.lookAt(path.path[path.target])
+            }
+          }
+        }
+        //if reached target
+        if (path.target < path.path.length) {
           transform.position = Vector3.Lerp(
             path.path[path.origin],
             path.path[path.target],
             path.fraction
           )
-        } else {
-          path.origin = path.target
-          path.target += 1
-          if (path.target >= path.path.length) {
-            if (path.loop) {
-              path.target = 0
-            } else {
-              npc.stopWalking()
-              if (path.onFinishCallback) {
-                path.onFinishCallback()
-              }
-              path.fraction = 1
-              return
-            }
-          } else if (path.onReachedPointCallback) {
-            path.onReachedPointCallback()
-          }
-          path.fraction = 0
-          transform.lookAt(path.path[path.target])
         }
       }
+      /*}catch(e){
+        debugger
+        log("npc.utils.NPCWalkSystem throw error",e)
+      }*/
     }
   }
 
diff --git a/src/npc/npc.ts b/src/npc/npc.ts
index 4486248..dec0990 100644
--- a/src/npc/npc.ts
+++ b/src/npc/npc.ts
@@ -62,13 +62,15 @@ export class NPC extends Entity {
       this.dialog = new DialogWindow(
         typeof data.portrait === `string` ? { path: data.portrait } : data.portrait,
         data && data.darkUI ? data.darkUI : false,
-        data.dialogSound ? data.dialogSound : undefined
+        data.dialogSound ? data.dialogSound : undefined,
+        data && data.dialogCustomTheme ? data.dialogCustomTheme : undefined
       )
     } else {
       this.dialog = new DialogWindow(
         undefined,
         data && data.darkUI ? data.darkUI : false,
-        data && data.dialogSound ? data.dialogSound : undefined
+        data && data.dialogSound ? data.dialogSound : undefined,
+        data && data.dialogCustomTheme ? data.dialogCustomTheme : undefined
       )
     }
 
@@ -194,7 +196,7 @@ export class NPC extends Entity {
     }
 
     if (data && data.path) {
-      this.addComponent(new NPCLerpData(data.path ? data.path : []))
+      this.addComponent(new NPCLerpData(data.path ? data.path : [],data.pathLerpType))
       this.getComponent(NPCLerpData).loop = true
       
       this.followPath()
@@ -355,7 +357,7 @@ export class NPC extends Entity {
       if (!data) {
         return
       }
-      this.addComponent(new NPCLerpData(data.path ? data.path : []))
+      this.addComponent(new NPCLerpData(data.path ? data.path : [],data.pathLerpType))
     }
 
     if (this.faceUser) {
diff --git a/src/utils/types.ts b/src/utils/types.ts
index a39e6da..4e5f01a 100644
--- a/src/utils/types.ts
+++ b/src/utils/types.ts
@@ -135,9 +135,11 @@ export type NPCData = {
   coolDownDuration?: number
   hoverText?: string
   dialogSound?: string
+  dialogCustomTheme?: Texture
   walkingAnim?: string
   walkingSpeed?: number
   path?: Vector3[]
+  pathLerpType?: NPCLerpType
   textBubble?: boolean
   bubbleHeight?: number
   noUI?: boolean
@@ -165,6 +167,7 @@ export type FollowPathData = {
   totalDuration?: number
   speed?: number
   path?: Vector3[]
+  pathLerpType?: NPCLerpType
   onFinishCallback?: () => void
   onReachedPointCallback?: () => void
 }
@@ -213,3 +216,9 @@ export enum NPCState {
   FOLLOWPATH = 'followPath'
   //FOLLOWPLAYER = 'followPlayer'
 }
+
+
+export enum NPCLerpType {
+  SMOOTH_PATH = 'smooth', //will follow the path but can cut sharp corners
+  RIGID_PATH = 'rigid', //will ensure each corner is hit
+}