# Objective
- It's not clear what changes are needed to the shader to convert the
example to 2D.
- If you leave the shader unchanged you get a very confusing error (see
linked issue).
- Fixes#14077
## Solution
A separate example probably isn't needed as there is little difference
between 3D and 2D, but a note saying what changes are needed to the
shader would make it a lot easier.
Let me know if you think it is also worth adding some notes to the rust
file, but it is mostly trivial changes such as changing `Mesh3d` to
`Mesh2d`. I have left the original code in comments next to the changes
in the gist linked at the bottom if you wish to compare.
## Testing
- I just spent a long time working it out the hard way. This would have
made it a lot quicker.
- I have tested the 2D version of the shader with the changes explained
in the suggested comment and it works as expected.
- For testing purposes [here is a complete working 2D
example](https://gist.github.com/nickyfahey/647e2a2c45e695f24e288432b811dfc2).
(note that as per the original example the shader file needs to go in
'assets/shaders/')
831073105f