1、通过SCNGeometry或子类SCNParametricGeometry创建
相关链接：iOS开发之SceneKit框架--SCNGeometry.h
iOS开发之SceneKit框架--SCNParametricGeometry.h
2、创建多个场景SCNScene读取其子node
SCNNode *newNode = [SCNNode node];
newNode.position = SCNVector3Make(, , );
[self.sCNView.scene.rootNode addChildNode:newNode];
SCNScene *sceneShip = [SCNScene sceneNamed:@"art.scnassets/ship.scn"];
for (id node in sceneShip.rootNode.childNodes) {
[newNode addChildNode:node];
}