Irrlicht Engine

Hello i have one question.
can the engine interpolate between frames?

what model format are you using? In general if the model format interpolates between frames then so will irrlicht when you import the model and render it.

cool!!!:shock:
could u please give me example for interpolated types?

i make a game without device->sleep(), and while my char walk is slower than when i use device->sleep(), even the model animation(walking animation) doesn't get slower or faster, is this related?

You can change the speed of the animation, check the API under IAnimatedMeshSceneNode.