diff --git a/examples/shaders/resources/shaders/glsl100/gbuffer.vs b/examples/shaders/resources/shaders/glsl100/gbuffer.vs
index 2791ce5ee..d9484f273 100644
--- a/examples/shaders/resources/shaders/glsl100/gbuffer.vs
+++ b/examples/shaders/resources/shaders/glsl100/gbuffer.vs
@@ -1,60 +1,30 @@
-#version 100
+#version 300 es
 
-// Input vertex attributes
-attribute vec3 vertexPosition;
-attribute vec2 vertexTexCoord;
-attribute vec3 vertexNormal;
-attribute vec4 vertexColor;
+precision highp float;
+
+in vec3 vertexPosition;
+in vec2 vertexTexCoord;
+in vec3 vertexNormal;
+in vec4 vertexColor;
+
+out vec3 fragPosition;
+out vec2 fragTexCoord;
+out vec3 fragNormal;
+out vec4 fragColor;
 
-// Input uniform values
 uniform mat4 matModel;
 uniform mat4 matView;
 uniform mat4 matProjection;
 
-// Output vertex attributes (to fragment shader)
-varying vec3 fragPosition;
-varying vec2 fragTexCoord;
-varying vec3 fragNormal;
-varying vec4 fragColor;
-
-
-// https://github.com/glslify/glsl-inverse
-mat3 inverse(mat3 m)
-{
-    float a00 = m[0][0], a01 = m[0][1], a02 = m[0][2];
-    float a10 = m[1][0], a11 = m[1][1], a12 = m[1][2];
-    float a20 = m[2][0], a21 = m[2][1], a22 = m[2][2];
-
-    float b01 = a22*a11 - a12*a21;
-    float b11 = -a22*a10 + a12*a20;
-    float b21 = a21*a10 - a11*a20;
-
-    float det = a00*b01 + a01*b11 + a02*b21;
-
-    return mat3(b01, (-a22*a01 + a02*a21), (a12*a01 - a02*a11),
-              b11, (a22*a00 - a02*a20), (-a12*a00 + a02*a10),
-              b21, (-a21*a00 + a01*a20), (a11*a00 - a01*a10))/det;
-}
-
-// https://github.com/glslify/glsl-transpose
-mat3 transpose(mat3 m)
-{
-    return mat3(m[0][0], m[1][0], m[2][0],
-              m[0][1], m[1][1], m[2][1],
-              m[0][2], m[1][2], m[2][2]);
-}
-
 void main()
 {
-    // Calculate vertex attributes for fragment shader
-    vec4 worldPos = matModel*vec4(vertexPosition, 1.0);
+    vec4 worldPos = matModel * vec4(vertexPosition, 1.0);
     fragPosition = worldPos.xyz; 
     fragTexCoord = vertexTexCoord;
     fragColor = vertexColor;
 
     mat3 normalMatrix = transpose(inverse(mat3(matModel)));
-    fragNormal = normalMatrix*vertexNormal;
+    fragNormal = normalMatrix * vertexNormal;
 
-    // Calculate final vertex position
-    gl_Position = matProjection*matView*worldPos;
+    gl_Position = matProjection * matView * worldPos;
 }