diff --git a/examples/gkurve/main.zig b/examples/gkurve/main.zig
index d77a08c9..118da372 100644
--- a/examples/gkurve/main.zig
+++ b/examples/gkurve/main.zig
@@ -12,13 +12,12 @@ const glfw = @import("glfw");
 pub const Vertex = struct {
     pos: @Vector(4, f32),
     uv: @Vector(2, f32),
-    bary: @Vector(3, f32) = .{ 0, 0, 0 },
 };
 // Simple triangle
 pub const vertices = [_]Vertex{
-    .{ .pos = .{ 0, 250, 0, 1 }, .uv = .{ 0.5, 1 }, .bary = .{ 0, 0, 1 } },
-    .{ .pos = .{ -250, -250, 0, 1 }, .uv = .{ 0, 0 }, .bary = .{ 1, 0, 0 } },
-    .{ .pos = .{ 250, -250, 0, 1 }, .uv = .{ 1, 0 }, .bary = .{ 0, 1, 0 } },
+    .{ .pos = .{ 0, 250, 0, 1 }, .uv = .{ 0.5, 1 } },
+    .{ .pos = .{ -250, -250, 0, 1 }, .uv = .{ 0, 0 } },
+    .{ .pos = .{ 250, -250, 0, 1 }, .uv = .{ 1, 0 } },
 };
 
 // TODO: Need to ask Ayush about this, ideally we have a square window in this example because it
@@ -73,7 +72,6 @@ pub fn init(app: *App, engine: *mach.Engine) !void {
     const vertex_attributes = [_]gpu.VertexAttribute{
         .{ .format = .float32x4, .offset = @offsetOf(Vertex, "pos"), .shader_location = 0 },
         .{ .format = .float32x2, .offset = @offsetOf(Vertex, "uv"), .shader_location = 1 },
-        .{ .format = .float32x3, .offset = @offsetOf(Vertex, "bary"), .shader_location = 2 },
     };
     const vertex_buffer_layout = gpu.VertexBufferLayout{
         .array_stride = @sizeOf(Vertex),
diff --git a/examples/gkurve/vert.wgsl b/examples/gkurve/vert.wgsl
index 1c008a8d..5e7cf473 100644
--- a/examples/gkurve/vert.wgsl
+++ b/examples/gkurve/vert.wgsl
@@ -12,14 +12,18 @@ struct VertexOut {
 
 @stage(vertex) fn main(
     @builtin(instance_index) instanceIdx: u32,
+    @builtin(vertex_index) vertex_index: u32,
     @location(0) position: vec4<f32>,
     @location(1) uv: vec2<f32>,
-    @location(2) bary: vec3<f32>,
 ) -> VertexOut {
-    var output: VertexOut;
+    var output : VertexOut;
     output.position_clip = ubos[instanceIdx].matrix * position;
     output.frag_uv = uv;
-    output.frag_bary = bary;
+    output.frag_bary = vec3<f32>(
+        f32(vertex_index % 3u == 1u),
+        f32(vertex_index % 3u == 2u),
+        f32(vertex_index % 3u == 0u),
+    );
     output.instance_index = instanceIdx;
     return output;
 }