diff --git a/settings.json b/settings.json
index f483c2a..d420e69 100644
--- a/settings.json
+++ b/settings.json
@@ -22,6 +22,7 @@
         "1.20.4-fabric",
         "1.20.6-forge",
         "1.20.6-neoforge",
-        "1.20.6-fabric"
+        "1.20.6-fabric",
+        "1.21-fabric"
     ]
 }
diff --git a/src/main/java/dev/tr7zw/skinlayers/api/Mesh.java b/src/main/java/dev/tr7zw/skinlayers/api/Mesh.java
index 32db474..cc1fb11 100644
--- a/src/main/java/dev/tr7zw/skinlayers/api/Mesh.java
+++ b/src/main/java/dev/tr7zw/skinlayers/api/Mesh.java
@@ -28,7 +28,7 @@ public void setPosition(float x, float y, float z) {
 
         @Override
         public void render(ModelPart vanillaModel, PoseStack poseStack, VertexConsumer vertexConsumer, int light,
-                int overlay, float red, float green, float blue, float alpha) {
+                int overlay, int color) {
         }
 
         @Override
@@ -52,11 +52,14 @@ public void copyFrom(ModelPart modelPart) {
     };
 
     public default void render(PoseStack poseStack, VertexConsumer vertexConsumer, int light, int overlay) {
-        render(null, poseStack, vertexConsumer, light, overlay, 1.0F, 1.0F, 1.0F, 1.0F);
+        render(null, poseStack, vertexConsumer, light, overlay, 0xFFFFFFFF);
     }
 
+    /**
+     * @param color The color, in ARGB format
+     */
     public void render(ModelPart vanillaModel, PoseStack poseStack, VertexConsumer vertexConsumer, int light,
-            int overlay, float red, float green, float blue, float alpha);
+                       int overlay, int color);
 
     public void setPosition(float x, float y, float z);
 
diff --git a/src/main/java/dev/tr7zw/skinlayers/config/ConfigScreenProvider.java b/src/main/java/dev/tr7zw/skinlayers/config/ConfigScreenProvider.java
index 40d2465..995643f 100644
--- a/src/main/java/dev/tr7zw/skinlayers/config/ConfigScreenProvider.java
+++ b/src/main/java/dev/tr7zw/skinlayers/config/ConfigScreenProvider.java
@@ -28,6 +28,10 @@ public class ConfigScreenProvider {
     public static Screen createConfigScreen(Screen parent) {
         return new CustomConfigScreen(parent, "text.skinlayers.title") {
 
+            @Override
+            protected void addOptions() {
+            }
+
             @Override
             public void initialize() {
                 Config config = SkinLayersModBase.config;
diff --git a/src/main/java/dev/tr7zw/skinlayers/render/CustomizableModelPart.java b/src/main/java/dev/tr7zw/skinlayers/render/CustomizableModelPart.java
index bec2675..dada624 100644
--- a/src/main/java/dev/tr7zw/skinlayers/render/CustomizableModelPart.java
+++ b/src/main/java/dev/tr7zw/skinlayers/render/CustomizableModelPart.java
@@ -76,15 +76,34 @@ public void render(PoseStack poseStack, VertexConsumer vertexConsumer, int i, in
         render(null, poseStack, vertexConsumer, i, j, 1.0F, 1.0F, 1.0F, 1.0F);
     }
 
+    private int convertFloatColorToInteger(float color) {
+        return color > 1F ? 255 : Math.round(color * 255F);
+    }
+
+    /**
+     * Kept for some mod (like ETF) shadowing the old render method to call
+     */
+    @Deprecated(forRemoval = true)
     public void render(ModelPart vanillaModel, PoseStack poseStack, VertexConsumer vertexConsumer, int light,
             int overlay, float red, float green, float blue, float alpha) {
+        var color = (convertFloatColorToInteger(alpha) & 0xFF) << 24| (convertFloatColorToInteger(red) & 0xFF) << 16
+                | (convertFloatColorToInteger(green) & 0xFF) << 8 | convertFloatColorToInteger(blue) & 0xFF;
+
+        render(vanillaModel, poseStack, vertexConsumer, light, overlay, color);
+    }
+
+    /**
+     * @param color Color, in ARGB format
+     */
+    public void render(ModelPart vanillaModel, PoseStack poseStack, VertexConsumer vertexConsumer, int light,
+            int overlay, int color) {
         if (!this.visible)
             return;
         poseStack.pushPose();
         translateAndRotate(poseStack);
-        compile(vanillaModel, poseStack.last(), vertexConsumer, light, overlay, red, green, blue, alpha);
+        compile(vanillaModel, poseStack.last(), vertexConsumer, light, overlay, color);
         for (ModelPart modelPart : this.children.values())
-            modelPart.render(poseStack, vertexConsumer, light, overlay, red, green, blue, alpha);
+            modelPart.render(poseStack, vertexConsumer, light, overlay, color);
         poseStack.popPose();
     }
 
@@ -109,7 +128,7 @@ public void translateAndRotate(PoseStack poseStack) {
     private Vector4f vector4f[] = new Vector4f[] { new Vector4f(), new Vector4f(), new Vector4f(), new Vector4f() };
 
     private void compile(ModelPart vanillaModel, PoseStack.Pose pose, VertexConsumer vertexConsumer, int light,
-            int overlay, float red, float green, float blue, float alpha) {
+            int overlay, int color) {
         MeshTransformer transformer = SkinLayersAPI.getMeshTransformerProvider().prepareTransformer(vanillaModel);
         // compacted Cubes
         Matrix4f matrix4f = pose.pose();
@@ -134,9 +153,12 @@ private void compile(ModelPart vanillaModel, PoseStack.Pose pose, VertexConsumer
             //$$      vector4f[o].transform(matrix4f);
     	    //#endif
     	    //spotless:on
-                vertexConsumer.vertex(vector4f[o].x(), vector4f[o].y(), vector4f[o].z(), red, green, blue, alpha,
-                        polygonData[id + 3 + (o * 5) + 3], polygonData[id + 3 + (o * 5) + 4], overlay, light,
-                        vector3f.x(), vector3f.y(), vector3f.z());
+                vertexConsumer.addVertex(vector4f[o].x(), vector4f[o].y(), vector4f[o].z());
+                vertexConsumer.setColor(color);
+                vertexConsumer.setUv(polygonData[id + 3 + (o * 5) + 3], polygonData[id + 3 + (o * 5) + 4]);
+                vertexConsumer.setOverlay(overlay);
+                vertexConsumer.setLight(light);
+                vertexConsumer.setNormal(vector3f.x(), vector3f.y(), vector3f.z());
             }
         }
 
@@ -145,7 +167,7 @@ private void compile(ModelPart vanillaModel, PoseStack.Pose pose, VertexConsumer
             transformer.transform(cube);
             // spotless:off
             //#if MC >= 11700
-            cube.compile(pose, vertexConsumer, light, overlay, red, green, blue, alpha);
+            cube.compile(pose, vertexConsumer, light, overlay, color);
             //#else
 			  //$$ for (ModelPart.Polygon polygon : cube.polygons) {
 	          //$$ 	Vector3f vector3f = polygon.normal.copy();
diff --git a/src/main/java/dev/tr7zw/skinlayers/renderlayers/CustomLayerFeatureRenderer.java b/src/main/java/dev/tr7zw/skinlayers/renderlayers/CustomLayerFeatureRenderer.java
index b850a38..1fe4e29 100644
--- a/src/main/java/dev/tr7zw/skinlayers/renderlayers/CustomLayerFeatureRenderer.java
+++ b/src/main/java/dev/tr7zw/skinlayers/renderlayers/CustomLayerFeatureRenderer.java
@@ -137,7 +137,7 @@ public void renderLayers(AbstractClientPlayer abstractClientPlayer, PlayerSettin
 
                 mesh.setPosition(x, y, 0);
 
-                mesh.render(layer.vanillaGetter.get(), matrixStack, vertices, light, overlay, 1.0f, 1.0f, 1.0f, 1.0f);
+                mesh.render(layer.vanillaGetter.get(), matrixStack, vertices, light, overlay, 0xFFFFFFFF);
                 matrixStack.popPose();
             }
         }
diff --git a/versions/mainProject b/versions/mainProject
index 304eaac..dfdd511 100644
--- a/versions/mainProject
+++ b/versions/mainProject
@@ -1 +1 @@
-1.20.6-fabric
\ No newline at end of file
+1.21-fabric
\ No newline at end of file