How to make natural lighting in ARKit?

Question

I want lighting of added projects in my ARKit project to be similar to real-world objects. Please explain how to achieve this? Thank you

Answer 1

You can add lighting to an SCNMaterial by choosing from one of the lightingModel parameters e.g:

To add one of these to an SCNMaterial all you need to do is the following:

material.lightingModel = .constant 

You can also make objects appear more realistic by making use of the following variable of an SCNView:

var autoenablesDefaultLighting: Bool { get set }

autoEnablesDefaultLighting is simply a Boolean value that determines whether SceneKit automatically adds lights to a scene or not.

By default this is set as false meaning that:

the only light sources SceneKit uses for rendering a scene are those contained in the scene graph.

If on the other hand, this is set to true:

SceneKit automatically adds and places an omnidirectional light source when rendering scenes that contain no lights or only contain ambient lights.

To apply this setting to an SCNView therefore, all you need to do is use the following:

augmentedRealityScene.autoenablesDefaultLighting = true

In addition to these suggestions, you can also create different types of lights to add to your scene e.g:

func createDirectionalLight(){

        let spotLight = SCNNode()
        spotLight.light = SCNLight()
        spotLight.scale = SCNVector3(1,1,1)
        spotLight.light?.intensity = 1000
        spotLight.castsShadow = true
        spotLight.position = SCNVector3Zero
        spotLight.light?.type = SCNLight.LightType.directional
        spotLight.light?.color = UIColor.white
}

Hope this helps...