In my app I load models from different files (format is the same) and they have different geometry: big, small, wide, etc. I have object and camera position hard coded and for some cases I don't see anything because camera not point to object.
Maybe there is a way to normalise model before adding it to scene.
Update. With Moustach answer I came up to following solution:
// import object from file SCNNode *object = [importer load:path]; object.position = SCNVector3Make(0, 0, 0); [scene.rootNode addChildNode:object]; // create and add a camera to the scene SCNNode *cameraNode = [SCNNode node]; cameraNode.camera = [SCNCamera camera]; // to avoid view clipping cameraNode.camera.automaticallyAdjustsZRange = YES; // set camera position to front of object SCNVector3 sphereCenter; CGFloat sphereRadius; [object getBoundingSphereCenter:&sphereCenter radius:&sphereRadius]; cameraNode.position = SCNVector3Make(sphereCenter.x, sphereCenter.y, sphereCenter.z + 2 * sphereRadius); [scene.rootNode addChildNode:cameraNode];
Works well for me.