Irrlicht Engine

Thanks for your responses. Finally i will lets the 64 cubes on the chessboard

I would like to know if i can identify the face i found from the getCollisionPoint function. For example on a chess board mesh, i find the current collided face have index 32, so i can process it to find the case on the chessboard. What the method to implement that feature?   core::line3d<f32> raytr...