diff --git a/leenkx/Sources/iron/object/ParticleSystem.hx b/leenkx/Sources/iron/object/ParticleSystem.hx
index a6b03da..5fab3a7 100644
--- a/leenkx/Sources/iron/object/ParticleSystem.hx
+++ b/leenkx/Sources/iron/object/ParticleSystem.hx
@@ -8,6 +8,8 @@ import kha.arrays.Float32Array;
 import iron.data.Data;
 import iron.data.ParticleData;
 import iron.data.SceneFormat;
+import iron.data.Geometry;
+import iron.data.MeshData;
 import iron.system.Time;
 import iron.math.Mat4;
 import iron.math.Quat;
@@ -17,6 +19,7 @@ import iron.math.Vec4;
 class ParticleSystem {
 	public var data: ParticleData;
 	public var speed = 1.0;
+	public var dynamicEmitter: Bool = true;
 	var currentSpeed = 0.0;
 	var particles: Array<Particle>;
 	var ready: Bool;
@@ -52,6 +55,12 @@ class ParticleSystem {
 	
 	var random = 0.0;
 
+	var tmpV4 = new Vec4();
+
+	var instancedData: Float32Array = null;
+	var lastSpawnedCount: Int = 0;
+	var hasUniqueGeom: Bool = false; 
+
 	public function new(sceneName: String, pref: TParticleReference) {
 		seed = pref.seed;
 		currentSpeed = speed;
@@ -62,6 +71,11 @@ class ParticleSystem {
 		Data.getParticle(sceneName, pref.particle, function(b: ParticleData) {
 			data = b;
 			r = data.raw;
+			if (r.dynamic_emitter != null){
+				dynamicEmitter = r.dynamic_emitter; 
+			} else {
+				dynamicEmitter = true;
+			}
 			if (Scene.active.raw.gravity != null) {
 				gx = Scene.active.raw.gravity[0] * r.weight_gravity;
 				gy = Scene.active.raw.gravity[1] * r.weight_gravity;
@@ -98,6 +112,8 @@ class ParticleSystem {
 		lap = 0;
 		lapTime = 0;
 		speed = currentSpeed;
+		lastSpawnedCount = 0;
+		instancedData = null;
 	}
 
 	public function pause() {
@@ -130,8 +146,13 @@ class ParticleSystem {
 
 		// Copy owner world transform but discard scale
 		owner.transform.world.decompose(ownerLoc, ownerRot, ownerScl);
-		object.transform.loc = ownerLoc;
-		object.transform.rot = ownerRot;
+		if (dynamicEmitter) {
+			object.transform.loc.x = 0; object.transform.loc.y = 0; object.transform.loc.z = 0;
+			object.transform.rot = new Quat();
+		} else {
+			object.transform.loc = ownerLoc;
+			object.transform.rot = ownerRot;
+		}
 
 		// Set particle size per particle system
 		object.transform.scale = new Vec4(r.particle_size, r.particle_size, r.particle_size, 1);
@@ -158,13 +179,18 @@ class ParticleSystem {
 		if (lap > prevLap && !r.loop) {
 			end();
 		}
+
+		if (lap > prevLap && r.loop) {
+			lastSpawnedCount = 0;
+		}
 		
 		updateGpu(object, owner);
 	}
 
 	public function getData(): Mat4 {
 		var hair = r.type == 1;
-		m._00 = animtime;
+		// Store loop flag in the sign: positive -> loop, negative -> no loop
+		m._00 = r.loop ? animtime : -animtime;
 		m._01 = hair ? 1 / particles.length : spawnRate;
 		m._02 = hair ? 1 : lifetime;
 		m._03 = particles.length;
@@ -187,17 +213,26 @@ class ParticleSystem {
 		return r.size_random;
 	}
 
-	public function getRandom(): FastFloat {
+	public inline function getRandom(): FastFloat {
 		return random;
 	}
 
-	public function getSize(): FastFloat {
+	public inline function getSize(): FastFloat {
 		return r.particle_size;
 	}
 
 	function updateGpu(object: MeshObject, owner: MeshObject) {
-		if (!object.data.geom.instanced) setupGeomGpu(object, owner);
-		// GPU particles transform is attached to owner object
+		if (dynamicEmitter) {
+			if (!hasUniqueGeom) ensureUniqueGeom(object);
+			var needSetup = instancedData == null || object.data.geom.instancedVB == null;
+			if (needSetup) setupGeomGpuDynamic(object, owner);
+			updateSpawnedInstances(object, owner);
+		}
+		else {
+			if (!hasUniqueGeom) ensureUniqueGeom(object);
+			if (!object.data.geom.instanced) setupGeomGpu(object, owner);
+		}
+		// GPU particles transform is attached to owner object in static mode
 	}
 
 	function setupGeomGpu(object: MeshObject, owner: MeshObject) {
@@ -258,18 +293,134 @@ class ParticleSystem {
 		object.data.geom.setupInstanced(instancedData, 1, Usage.StaticUsage);
 	}
 
-	function fhash(n: Int): Float {
-		var s = n + 1.0;
-		s *= 9301.0 % s;
-		s = (s * 9301.0 + 49297.0) % 233280.0;
-		return s / 233280.0;
+	// allocate instanced VB once for this object 
+	function setupGeomGpuDynamic(object: MeshObject, owner: MeshObject) {
+		if (instancedData == null) instancedData = new Float32Array(particles.length * 3);
+		lastSpawnedCount = 0; 
+		// Create instanced VB once if missing (seed with our instancedData)
+		if (object.data.geom.instancedVB == null) {
+			object.data.geom.setupInstanced(instancedData, 1, Usage.DynamicUsage);
+		}
 	}
 
+	function ensureUniqueGeom(object: MeshObject) {
+		if (hasUniqueGeom) return;
+		var newData: MeshData = null;
+		new MeshData(object.data.raw, function(dat: MeshData) {
+			dat.scalePos = object.data.scalePos;
+			dat.scaleTex = object.data.scaleTex;
+			dat.format = object.data.format;
+			newData = dat;
+		});
+		if (newData != null) object.setData(newData);
+		hasUniqueGeom = true;
+	}
+
+	function updateSpawnedInstances(object: MeshObject, owner: MeshObject) {
+		if (instancedData == null) return;
+		var targetCount = count;
+		if (targetCount > particles.length) targetCount = particles.length;
+		if (targetCount <= lastSpawnedCount) return;
+
+		var normFactor = 1 / 32767;
+		var scalePosOwner = owner.data.scalePos;
+		var scalePosParticle = object.data.scalePos;
+		var particleSize = r.particle_size;
+		var base = 1.0 / (particleSize * scalePosParticle);
+
+		switch (r.emit_from) {
+			case 0: // Vert
+				var pa = owner.data.geom.positions;
+				var osx = owner.transform.scale.x;
+				var osy = owner.transform.scale.y;
+				var osz = owner.transform.scale.z;
+				var pCount = Std.int(pa.values.length / pa.size);
+				for (idx in lastSpawnedCount...targetCount) {
+					var j = Std.int(fhash(idx) * pCount);
+					var lx = pa.values[j * pa.size    ] * normFactor * scalePosOwner * osx;
+					var ly = pa.values[j * pa.size + 1] * normFactor * scalePosOwner * osy;
+					var lz = pa.values[j * pa.size + 2] * normFactor * scalePosOwner * osz;
+					tmpV4.x = lx; tmpV4.y = ly; tmpV4.z = lz; tmpV4.w = 1;
+					tmpV4.applyQuat(ownerRot);
+					var o = idx * 3;
+					instancedData.set(o    , (tmpV4.x + ownerLoc.x) * base);
+					instancedData.set(o + 1, (tmpV4.y + ownerLoc.y) * base);
+					instancedData.set(o + 2, (tmpV4.z + ownerLoc.z) * base);
+				}
+
+			case 1: // Face
+				var positions = owner.data.geom.positions.values;
+				var osx1 = owner.transform.scale.x;
+				var osy1 = owner.transform.scale.y;
+				var osz1 = owner.transform.scale.z;
+				for (idx in lastSpawnedCount...targetCount) {
+					var ia = owner.data.geom.indices[Std.random(owner.data.geom.indices.length)];
+					var faceIndex = Std.random(Std.int(ia.length / 3));
+					var i0 = ia[faceIndex * 3 + 0];
+					var i1 = ia[faceIndex * 3 + 1];
+					var i2 = ia[faceIndex * 3 + 2];
+					var v0x = positions[i0 * 4    ], v0y = positions[i0 * 4 + 1], v0z = positions[i0 * 4 + 2];
+					var v1x = positions[i1 * 4    ], v1y = positions[i1 * 4 + 1], v1z = positions[i1 * 4 + 2];
+					var v2x = positions[i2 * 4    ], v2y = positions[i2 * 4 + 1], v2z = positions[i2 * 4 + 2];
+					var rx = Math.random(); var ry = Math.random(); if (rx + ry > 1) { rx = 1 - rx; ry = 1 - ry; }
+					var pxs = v0x + rx * (v1x - v0x) + ry * (v2x - v0x);
+					var pys = v0y + rx * (v1y - v0y) + ry * (v2y - v0y);
+					var pzs = v0z + rx * (v1z - v0z) + ry * (v2z - v0z);
+					var px = pxs * normFactor * scalePosOwner * osx1;
+					var py = pys * normFactor * scalePosOwner * osy1;
+					var pz = pzs * normFactor * scalePosOwner * osz1;
+					tmpV4.x = px; tmpV4.y = py; tmpV4.z = pz; tmpV4.w = 1;
+					tmpV4.applyQuat(ownerRot);
+					var o1 = idx * 3;
+					instancedData.set(o1    , (tmpV4.x + ownerLoc.x) * base);
+					instancedData.set(o1 + 1, (tmpV4.y + ownerLoc.y) * base);
+					instancedData.set(o1 + 2, (tmpV4.z + ownerLoc.z) * base);
+				}
+
+			case 2: // Volume
+				var dim = object.transform.dim;
+				for (idx in lastSpawnedCount...targetCount) {
+					tmpV4.x = (Math.random() * 2.0 - 1.0) * (dim.x * 0.5);
+					tmpV4.y = (Math.random() * 2.0 - 1.0) * (dim.y * 0.5);
+					tmpV4.z = (Math.random() * 2.0 - 1.0) * (dim.z * 0.5);
+					tmpV4.w = 1;
+					tmpV4.applyQuat(ownerRot);
+					var o2 = idx * 3;
+					instancedData.set(o2    , (tmpV4.x + ownerLoc.x) * base);
+					instancedData.set(o2 + 1, (tmpV4.y + ownerLoc.y) * base);
+					instancedData.set(o2 + 2, (tmpV4.z + ownerLoc.z) * base);
+				}
+		}
+
+		// Upload full active range [0..targetCount) to this object's instanced VB
+		var geom = object.data.geom;
+		if (geom.instancedVB == null) {
+			geom.setupInstanced(instancedData, 1, Usage.DynamicUsage);
+		}
+		var vb = geom.instancedVB.lock();
+		var totalFloats = targetCount * 3; // xyz per instance
+		var i = 0;
+		while (i < totalFloats) {
+			vb.setFloat32(i * 4, instancedData[i]);
+			i++;
+		}
+		geom.instancedVB.unlock();
+		geom.instanceCount = targetCount;
+		lastSpawnedCount = targetCount;
+	}
+
+	inline function fhash(n: Int): Float {
+    var s = n + 1.0;
+    s *= 9301.0 % s;
+    s = (s * 9301.0 + 49297.0) % 233280.0;
+    return s / 233280.0;
+}
+
 	public function remove() {}
 
 	/**
 		Generates a random point in the triangle with vertex positions abc.
-
+		
 		Please note that the given position vectors are changed in-place by this
 		function and can be considered garbage afterwards, so make sure to clone
 		them first if needed.