Bonjour à tous! Je débute avec Three, et j'avais dans l'idée de créer un paysage enneigé. J'ai deux scènes différentes, un qui affiche le paysage, je me suis servi d'un des cubes présents, et l'autre qui fait tomber des particules. Et je n'arrive pas a fusionner les deux! Je passe, soit d'un écran totalement noir avec Firebug qui pète une erreur, soit le background est présent mais mes particules sont rassemblées en un carré compact au centre.

Merci d'avance

La neige
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var SCREEN_WIDTH = window.innerWidth;
			var SCREEN_HEIGHT = window.innerHeight;
			var container;
			var particle;
			var camera;
			var scene;
			var renderer;
			var mouseX = 0;
			var mouseY = 0;
			var windowHalfX = window.innerWidth / 2;
			var windowHalfY = window.innerHeight / 2;
 
			var particles = []; 
			var particleImage = new Image();//THREE.ImageUtils.loadTexture( "ParticleSmoke.png" );
			particleImage.src = 'ParticleSmoke.png'; 
 
 
			function init() {
				container = document.createElement('div');
				document.body.appendChild(container);
				camera = new THREE.PerspectiveCamera( 75, SCREEN_WIDTH / SCREEN_HEIGHT, 1, 10000 );
				camera.position.z = 1000;
				scene = new THREE.Scene();
				scene.add(camera);
 
				renderer = new THREE.CanvasRenderer();
				renderer.setSize(SCREEN_WIDTH, SCREEN_HEIGHT);
				var material = new THREE.ParticleBasicMaterial( { map: new THREE.Texture(particleImage) } );
 
				for (var i = 0; i < 500; i++) {
					particle = new Particle3D( material);
					particle.position.x = Math.random() * 2000 - 1000;
					particle.position.y = Math.random() * 2000 - 1000;
					particle.position.z = Math.random() * 2000 - 1000;
					particle.scale.x = particle.scale.y =  1;
					scene.add( particle );
 
					particles.push(particle); 
				}
				container.appendChild( renderer.domElement );
 
				document.addEventListener( 'mousemove', onDocumentMouseMove, false );
				document.addEventListener( 'touchstart', onDocumentTouchStart, false );
				document.addEventListener( 'touchmove', onDocumentTouchMove, false );
 
				setInterval( loop, 1000 / 60 );
 
			}
 
			function onDocumentMouseMove( event ) {
				mouseX = event.clientX - windowHalfX;
				mouseY = event.clientY - windowHalfY;
			}
			function onDocumentTouchStart( event ) {
				if ( event.touches.length == 1 ) {
					event.preventDefault();
					mouseX = event.touches[ 0 ].pageX - windowHalfX;
					mouseY = event.touches[ 0 ].pageY - windowHalfY;
				}
			}
			function onDocumentTouchMove( event ) {
				if ( event.touches.length == 1 ) {
					event.preventDefault();
					mouseX = event.touches[ 0 ].pageX - windowHalfX;
					mouseY = event.touches[ 0 ].pageY - windowHalfY;
				}
			}
			//
			function loop() {
			for(var i = 0; i<particles.length; i++)
				{
					var particle = particles[i]; 
					particle.updatePhysics(); 
 
					with(particle.position)
					{
						if(y<-1000) y+=2000; 
						if(x>1000) x-=2000; 
						else if(x<-1000) x+=2000; 
						if(z>1000) z-=2000; 
						else if(z<-1000) z+=2000; 
					}				
				}
 
				camera.position.x += ( mouseX - camera.position.x ) * 0.05;
				camera.position.y += ( - mouseY - camera.position.y ) * 0.05;
				camera.lookAt(scene.position); 
				renderer.render( scene, camera );
 
			}

Le fond
Code javascript : Sélectionner tout - Visualiser dans une fenêtre à part
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if ( ! Detector.webgl ) Detector.addGetWebGLMessage();
 
			var container;
 
			var camera, scene, renderer;
			var cameraCube, sceneCube;
 
			var mesh, geometry;
 
			var loader;
 
			var pointLight;
 
			var mouseX = 0;
			var mouseY = 0;
 
			var windowHalfX = window.innerWidth / 2;
			var windowHalfY = window.innerHeight / 2;
 
			document.addEventListener('mousemove', onDocumentMouseMove, false);
 
			init();
			animate();
 
 
			function init() {
 
				container = document.createElement( 'div' );
				document.body.appendChild( container );
 
				camera = new THREE.PerspectiveCamera( 50, window.innerWidth / window.innerHeight, 1, 5000 );
				camera.position.z = 2000;
 
				cameraCube = new THREE.PerspectiveCamera( 50, window.innerWidth / window.innerHeight, 1, 100 );
 
				scene = new THREE.Scene();
				sceneCube = new THREE.Scene();
 
				// LIGHTS
 
				var ambient = new THREE.AmbientLight( 0xffffff );
				scene.add( ambient );
 
				pointLight = new THREE.PointLight( 0xffffff, 2 );
				scene.add( pointLight );
 
				// light representation
 
				var path = "three/textures/cube/Park3Med/";
				var format = '.jpg';
				var urls = [
						path + 'px' + format, path + 'nx' + format,
						path + 'py' + format, path + 'ny' + format,
						path + 'pz' + format, path + 'nz' + format
					];
 
				var reflectionCube = THREE.ImageUtils.loadTextureCube( urls );
				reflectionCube.format = THREE.RGBFormat;
 
				var refractionCube = new THREE.CubeTexture( reflectionCube.image, THREE.CubeRefractionMapping );
				refractionCube.format = THREE.RGBFormat;
 
				//var cubeMaterial3 = new THREE.MeshPhongMaterial( { color: 0x000000, specular:0xaa0000, envMap: reflectionCube, combine: THREE.MixOperation, reflectivity: 0.25 } );
				var cubeMaterial3 = new THREE.MeshLambertMaterial( { color: 0xff6600, envMap: reflectionCube, combine: THREE.MixOperation, reflectivity: 0.3 } );
				var cubeMaterial2 = new THREE.MeshLambertMaterial( { color: 0xffee00, envMap: refractionCube, refractionRatio: 0.95 } );
				var cubeMaterial1 = new THREE.MeshLambertMaterial( { color: 0xffffff, envMap: reflectionCube } )
 
				// Skybox
 
				var shader = THREE.ShaderLib[ "cube" ];
				shader.uniforms[ "tCube" ].value = reflectionCube;
 
				var material = new THREE.ShaderMaterial( {
 
					fragmentShader: shader.fragmentShader,
					vertexShader: shader.vertexShader,
					uniforms: shader.uniforms,
					depthWrite: false,
					side: THREE.BackSide
 
				} ),
 
				mesh = new THREE.Mesh( new THREE.BoxGeometry( 100, 100, 100 ), material );
				sceneCube.add( mesh );
 
				//
 
				renderer = new THREE.WebGLRenderer();
				renderer.setPixelRatio( window.devicePixelRatio );
				renderer.setSize( window.innerWidth, window.innerHeight );
				renderer.autoClear = false;
				container.appendChild( renderer.domElement );
 
				window.addEventListener( 'resize', onWindowResize, false );
 
			}
 
			function onWindowResize() {
 
				windowHalfX = window.innerWidth / 2;
				windowHalfY = window.innerHeight / 2;
 
				camera.aspect = window.innerWidth / window.innerHeight;
				camera.updateProjectionMatrix();
 
				cameraCube.aspect = window.innerWidth / window.innerHeight;
				cameraCube.updateProjectionMatrix();
 
				renderer.setSize( window.innerWidth, window.innerHeight );
 
			}
 
 
 
			function onDocumentMouseMove(event) {
 
				mouseX = ( event.clientX - windowHalfX ) * 4;
				mouseY = ( event.clientY - windowHalfY ) * 4;
 
			}
 
			//
 
			function animate() {
 
				requestAnimationFrame( animate );
 
				render();
 
			}
 
			function render() {
 
				var timer = -0.0002 * Date.now();
 
				pointLight.position.x = 1500 * Math.cos( timer );
				pointLight.position.z = 1500 * Math.sin( timer );
 
				camera.position.x += ( mouseX - camera.position.x ) * .05;
				camera.position.y += ( - mouseY - camera.position.y ) * .05;
 
				camera.lookAt( scene.position );
				cameraCube.rotation.copy( camera.rotation );
 
				renderer.render( sceneCube, cameraCube );
				renderer.render( scene, camera );
 
			}