New Skybox Generator

Author: ReJ aka Renaldas Zioma

Description

Generates Skybox by rendering 6 images and combining them with skybox material. Select multiple scene objects to render Skyboxes from multiple locations.

Usage

You must place the script in a folder named "Editor" in your project's Assets folder for it to work properly.

Select one or more scene objects which you want to use as the origin point(s) for the Skybox(es), then choose "Custom/Render Skybox" menu item and wait for a few seconds. Generated skybox images will appear under folder named "Skyboxes". You will find Skybox material in the same directory. Such Skybox material can be used in "Edit/Render Settings".

JavaScript - NewSkyBoxGenerator.js

class BakeSkybox
{
	static var faceSize = 512;
	static var directory = "Assets/Skyboxes";
	static var skyboxShader = "RenderFX/Skybox";
 
 
	static var skyBoxImage = new Array ("front", "right", "back", "left", "up", "down");
	static var skyBoxProps = new Array ("_FrontTex", "_RightTex", "_BackTex", "_LeftTex", "_UpTex", "_DownTex");
 
	static var skyDirection = new Array (Vector3 (0,0,0), Vector3 (0,-90,0), Vector3 (0,180,0), Vector3 (0,90,0), Vector3 (-90,0,0), Vector3 (90,0,0));
 
	@MenuItem("Custom/Bake Skybox", false, 4)
	static function Bake()
	{
		if (Selection.transforms.Length == 0)
		{
			Debug.LogWarning ("Select at least one scene object as a skybox center!");
			return;
		}
 
		if (!System.IO.Directory.Exists(directory))
			System.IO.Directory.CreateDirectory(directory);
 
		for (var t in Selection.transforms)
			RenderSkyboxTo6PNG(t);
	}
 
	static function RenderSkyboxTo6PNG(t : Transform)
	{
		var go = new GameObject ("SkyboxCamera", Camera);
 
		go.camera.backgroundColor = Color.black;
		go.camera.clearFlags = CameraClearFlags.Skybox;
		go.camera.fieldOfView = 90;    
		go.camera.aspect = 1.0;
 
		go.transform.position = t.position;
		go.transform.rotation = Quaternion.identity;
 
		// render skybox        
		for (var orientation = 0; orientation < skyDirection.length ; orientation++)
		{
			var assetPath = System.IO.Path.Combine(directory, t.name + "_" + skyBoxImage[orientation] + ".png");
			RenderSkyBoxFaceToPNG(orientation, go.camera, assetPath);
		}
		GameObject.DestroyImmediate (go);
 
		// wire skybox material
		AssetDatabase.Refresh();
 
		var skyboxMaterial = new Material (Shader.Find(skyboxShader));        
		for (orientation = 0; orientation < skyDirection.length ; orientation++)
		{
			var texPath = System.IO.Path.Combine(directory, t.name + "_" + skyBoxImage[orientation] + ".png");
			var tex : Texture2D = AssetDatabase.LoadAssetAtPath(texPath, Texture2D) as Texture2D;
			tex.wrapMode = TextureWrapMode.Clamp;
			skyboxMaterial.SetTexture(skyBoxProps[orientation] as String, tex);
		}
 
		// save material
		var matPath = System.IO.Path.Combine(directory, t.name + "_skybox" + ".mat");
		AssetDatabase.CreateAsset(skyboxMaterial, matPath);
	}
 
	static function RenderSkyBoxFaceToPNG(orientation : int, cam : Camera, assetPath : String)
	{
		cam.transform.eulerAngles = skyDirection[orientation];
		var rt = new RenderTexture (faceSize, faceSize, 24);
		cam.camera.targetTexture = rt;
		cam.camera.Render();
		RenderTexture.active = rt;
 
		var screenShot = new Texture2D (faceSize, faceSize, TextureFormat.RGB24, false);
		screenShot.ReadPixels (Rect (0, 0, faceSize, faceSize), 0, 0); 
 
		RenderTexture.active = null;
		GameObject.DestroyImmediate (rt);
 
		var bytes = screenShot.EncodeToPNG(); 
		System.IO.File.WriteAllBytes (assetPath, bytes);
 
		AssetDatabase.ImportAsset(assetPath, ImportAssetOptions.ForceUpdate);
	}
}