diff --git a/src/buffer.rs b/src/buffer.rs
index 4bb92a2..051cea8 100644
--- a/src/buffer.rs
+++ b/src/buffer.rs
@@ -130,7 +130,7 @@ pub unsafe fn create_index_buffer(
     device: &Device,
     data: &mut app_data::AppData,
 ) -> Result<()> {
-    let size = (size_of::<u16>() * data.indices.len()) as u64;
+    let size = (size_of::<u32>() * data.indices.len()) as u64;
 
     let (staging_buffer, staging_buffer_memory) = create_buffer(
         instance,
diff --git a/src/command_buffer.rs b/src/command_buffer.rs
index a2cbade..1ea5e17 100644
--- a/src/command_buffer.rs
+++ b/src/command_buffer.rs
@@ -70,7 +70,7 @@ pub unsafe fn create_command_buffers(device: &Device, data: &mut app_data::AppDa
             *command_buffer, vk::PipelineBindPoint::GRAPHICS, data.pipeline);
         
         device.cmd_bind_vertex_buffers(*command_buffer, 0, &[data.vertex_buffer], &[0]);
-        device.cmd_bind_index_buffer(*command_buffer, data.index_buffer, 0, vk::IndexType::UINT16);
+        device.cmd_bind_index_buffer(*command_buffer, data.index_buffer, 0, vk::IndexType::UINT32);
         
         device.cmd_bind_descriptor_sets(
             *command_buffer,
diff --git a/src/image.rs b/src/image.rs
index 9da5d33..770d886 100644
--- a/src/image.rs
+++ b/src/image.rs
@@ -29,6 +29,10 @@ pub unsafe fn create_texture_image(
     let size = reader.info().raw_bytes() as u64;
     let (width, height) = reader.info().size();
 
+    if width != 1024 || height != 1024 || reader.info().color_type != png::ColorType::Rgba {
+        panic!("Invalid texture image (use https://kylemayes.github.io/vulkanalia/images/viking_room.png).");
+    }
+
     let (staging_buffer, staging_buffer_memory) = buffer::create_buffer(
         instance,
         device,
diff --git a/src/main.rs b/src/main.rs
index 34e819b..0e62f84 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -307,7 +307,7 @@ impl App {
         
         let model = buffer::Mat4::from_axis_angle(
             vec3(0.0, 0.0, 1.0),
-            cgmath::Deg(90.0) * time
+            cgmath::Deg(90.0) * 0.0 //time
         );
 
         let view = buffer::Mat4::look_at_rh(
diff --git a/src/vertex.rs b/src/vertex.rs
index d8d80d8..8038561 100644
--- a/src/vertex.rs
+++ b/src/vertex.rs
@@ -41,14 +41,14 @@ impl Vertex {
             .binding(0)
             .location(1)
             .format(vk::Format::R32G32B32_SFLOAT)
-            .offset(size_of::<Vec2>() as u32)
+            .offset(size_of::<Vec3>() as u32)
             .build();
         
         let tex_coord = vk::VertexInputAttributeDescription::builder()
             .binding(0)
             .location(2)
             .format(vk::Format::R32G32_SFLOAT)
-            .offset((size_of::<Vec2>() + size_of::<Vec3>()) as u32)
+            .offset((size_of::<Vec3>() + size_of::<Vec3>()) as u32)
             .build();
         [pos, color, tex_coord]
     }