diff --git a/jsm/TetraGUI.js b/jsm/TetraGUI.js
index 55f7cd6..ccab83b 100644
--- a/jsm/TetraGUI.js
+++ b/jsm/TetraGUI.js
@@ -129,11 +129,9 @@ export class TetraGUI extends GUI {
                             envMap: environment,
                             side: THREE.DoubleSide,
                             transparent: true,
-                            opacity: 0.6,
-                            roughness: 0.5,
-                            metalness: 0.67,
-                            attenuationDistance: 0.5,
-                            ior: 2,
+                            opacity: 0.7,
+                            roughness: 0.6,
+                            metalness: 1,
                             sheen: 0,
                             sheenRoughness: 1,
                             specularIntensity: 1,
diff --git a/jsm/Tetrominoes.js b/jsm/Tetrominoes.js
index 067e976..6dfc1d5 100644
--- a/jsm/Tetrominoes.js
+++ b/jsm/Tetrominoes.js
@@ -132,13 +132,19 @@ class InstancedMino extends THREE.InstancedMesh {
 
 class Mino extends THREE.Object3D {
     static materials = {
-        Plasma: new THREE.MeshStandardMaterial({
+        Plasma: new THREE.MeshPhysicalMaterial({
             envMap: environment,
             side: THREE.DoubleSide,
             transparent: true,
-            opacity: 0.8,
-            roughness: 0.48,
-            metalness: 0.67,
+            opacity: 0.7,
+            roughness: 0.6,
+            ior: 1.8,
+            metalness: 0.6,
+            sheen: 0,
+            sheenRoughness: 1,
+            specularIntensity: 1,
+            thickness: 5,
+            transmission: 1,
         }),
         Espace: new THREE.MeshStandardMaterial({
             envMap: environment,