Add new shader file to README

Author: exeldro

README.md

@@ -161,6 +161,7 @@ loaded. In a standard, *.effect* files include a vertex shader and *.shader* onl
 I recommend *.shader* as they do not require `Use Effect File (.effect)` as pixel shaders, while *.effect* signifies vertex shaders with `Use Effect File (.effect)` required.
 | File                            | Description                                                                                                                                                                                                                                                                                                                                                                                             | Example                                                                                                   |
 | ------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | --------------------------------------------------------------------------------------------------------- |
+| 3d-panel.shader                 |                                                                                                                                                                                                                                                                                                                                                                                                         | ![image](https://github.com/user-attachments/assets/c8486d30-2ee2-46e8-bb57-fe8491b469b3)                 |
 | animated_texture.effect         | Animates a texture with polar sizing and color options                                                                                                                                                                                                                                                                                                                                                  |                                                                                                           |
 | alpha-gaming-bent-camera.shader |                                                                                                                                                                                                                                                                                                                                                                                                         | ![image](https://github.com/exeldro/obs-shaderfilter/assets/5457024/5fb6fec8-fc1b-46eb-96aa-17ce37a7ca20) |
 | ascii.shader                    | a little example of ascii art                                                                                                                                                                                                                                                                                                                                                                           | ![image](https://github.com/exeldro/obs-shaderfilter/assets/5457024/682ad2d3-d32a-464e-a3af-0791ba0fc829) |