diff --git a/orx-fx/src/commonMain/kotlin/math/MultiplyU.kt b/orx-fx/src/commonMain/kotlin/math/MultiplyU.kt
new file mode 100644
index 00000000..e906e5de
--- /dev/null
+++ b/orx-fx/src/commonMain/kotlin/math/MultiplyU.kt
@@ -0,0 +1,19 @@
+import org.openrndr.draw.Filter
+import org.openrndr.draw.filterShaderFromCode
+import org.openrndr.extra.fx.fx_film_grain
+import org.openrndr.extra.fx.fx_multiply_u
+import org.openrndr.extra.fx.mppFilterShader
+import org.openrndr.extra.parameters.BooleanParameter
+import org.openrndr.extra.parameters.Description
+import org.openrndr.extra.parameters.DoubleParameter
+/**
+ * Multiply by u coordinate
+ */
+@Description("multiply u")
+class MultiplyU : Filter(filterShaderFromCode(fx_multiply_u, "multiply-u")) {
+    @DoubleParameter("multiplication bias", 0.0, 2.0)
+    var bias: Double by parameters
+    init {
+        bias = 0.0
+    }
+}
\ No newline at end of file
diff --git a/orx-fx/src/commonMain/kotlin/math/MultiplyV.kt b/orx-fx/src/commonMain/kotlin/math/MultiplyV.kt
new file mode 100644
index 00000000..2609bfd7
--- /dev/null
+++ b/orx-fx/src/commonMain/kotlin/math/MultiplyV.kt
@@ -0,0 +1,22 @@
+import org.openrndr.draw.Filter
+import org.openrndr.draw.filterShaderFromCode
+import org.openrndr.extra.fx.fx_multiply_v
+import org.openrndr.extra.parameters.BooleanParameter
+import org.openrndr.extra.parameters.Description
+import org.openrndr.extra.parameters.DoubleParameter
+/**
+ * Multiply by v coordinate
+ */
+@Description("multiply v")
+class MultiplyV : Filter(filterShaderFromCode(fx_multiply_v, "multiply-v")) {
+    @DoubleParameter("multiplication bias", 0.0, 2.0)
+    var bias: Double by parameters
+
+    @BooleanParameter("invert v")
+    var invertV: Boolean by parameters
+
+    init {
+        bias = 0.0
+        invertV = false
+    }
+}
\ No newline at end of file
diff --git a/orx-fx/src/commonMain/kotlin/math/Square.kt b/orx-fx/src/commonMain/kotlin/math/Square.kt
new file mode 100644
index 00000000..3806e864
--- /dev/null
+++ b/orx-fx/src/commonMain/kotlin/math/Square.kt
@@ -0,0 +1,10 @@
+import org.openrndr.draw.Filter
+import org.openrndr.draw.filterShaderFromCode
+import org.openrndr.extra.fx.fx_square
+import org.openrndr.extra.parameters.Description
+/**
+ * Square input texture values
+ */
+@Description("square")
+class Square : Filter(filterShaderFromCode(fx_square, "square")) {
+}
\ No newline at end of file
diff --git a/orx-fx/src/shaders/glsl/math/multiply-u.frag b/orx-fx/src/shaders/glsl/math/multiply-u.frag
new file mode 100644
index 00000000..46b18ef5
--- /dev/null
+++ b/orx-fx/src/shaders/glsl/math/multiply-u.frag
@@ -0,0 +1,27 @@
+#ifdef OR_IN_OUT
+in vec2 v_texCoord0;
+#else
+varying vec2 v_texCoord0;
+#endif
+
+uniform sampler2D tex0;
+uniform float bias;
+
+#ifndef OR_GL_FRAGCOLOR
+out vec4 o_color;
+#endif
+
+void main() {
+    #ifndef OR_GL_TEXTURE2D
+    vec4 a = texture(tex0, v_texCoord0);
+    #else
+    vec4 a = texture2D(tex0, v_texCoord0);
+    #endif
+
+    vec4 result = a * (v_texCoord0.x + bias);
+    #ifdef OR_GL_FRAGCOLOR
+    gl_FragColor = result;
+    #else
+    o_color = result;
+    #endif
+}
\ No newline at end of file
diff --git a/orx-fx/src/shaders/glsl/math/multiply-v.frag b/orx-fx/src/shaders/glsl/math/multiply-v.frag
new file mode 100644
index 00000000..10b29d7c
--- /dev/null
+++ b/orx-fx/src/shaders/glsl/math/multiply-v.frag
@@ -0,0 +1,28 @@
+#ifdef OR_IN_OUT
+in vec2 v_texCoord0;
+#else
+varying vec2 v_texCoord0;
+#endif
+
+uniform sampler2D tex0;
+uniform float bias;
+uniform bool invertV;
+#ifndef OR_GL_FRAGCOLOR
+out vec4 o_color;
+#endif
+
+void main() {
+    #ifndef OR_GL_TEXTURE2D
+    vec4 a = texture(tex0, v_texCoord0);
+    #else
+    vec4 a = texture2D(tex0, v_texCoord0);
+    #endif
+
+    float v = invertV ? (1.0 - v_texCoord0.y) : v_texCoord0.y;
+    vec4 result = a * (v + bias);
+    #ifdef OR_GL_FRAGCOLOR
+    gl_FragColor = result;
+    #else
+    o_color = result;
+    #endif
+}
\ No newline at end of file
diff --git a/orx-fx/src/shaders/glsl/math/square.frag b/orx-fx/src/shaders/glsl/math/square.frag
new file mode 100644
index 00000000..c20b92f3
--- /dev/null
+++ b/orx-fx/src/shaders/glsl/math/square.frag
@@ -0,0 +1,26 @@
+#ifdef OR_IN_OUT
+in vec2 v_texCoord0;
+#else
+varying vec2 v_texCoord0;
+#endif
+
+uniform sampler2D tex0;
+uniform float bias;
+uniform float invertV;
+#ifndef OR_GL_FRAGCOLOR
+out vec4 o_color;
+#endif
+
+void main() {
+    #ifndef OR_GL_TEXTURE2D
+    vec4 a = texture(tex0, v_texCoord0);
+    #else
+    vec4 a = texture2D(tex0, v_texCoord0);
+    #endif
+    vec4 result = a * a;
+    #ifdef OR_GL_FRAGCOLOR
+    gl_FragColor = result;
+    #else
+    o_color = result;
+    #endif
+}
\ No newline at end of file