### Godot Version

4.2

### Question

I added this canvas_item shader to the CanvasItem Material:

```
shader_type canvas_item;
uniform float skew_amount : hint_range(-1.0, 1.0);
void vertex() {
// Apply skewing to vertex positions
VERTEX.x += VERTEX.y * skew_amount;
}
```

But that skews each individual particle…

I also tried this:

```
shader_type canvas_item;
uniform float skew_amount : hint_range(-1.0, 1.0);
void vertex() {
// Define skew matrix
mat4 skew_matrix = mat4(
vec4(1.0, skew_amount, 0.0, 0.0),
vec4(0.0, 1.0, 0.0, 0.0),
vec4(0.0, 0.0, 1.0, 0.0),
vec4(0.0, 0.0, 0.0, 1.0)
);
// Transform vertex to clip space (optional)
vec4 vertex_clip = MODEL_MATRIX * vec4(VERTEX.xy, 0.0, 1.0);
// Apply skew using skew matrix
vertex_clip = skew_matrix * vertex_clip;
// Set vertex position (already transformed or not)
VERTEX = vertex_clip.xy;
}
```

Which also skews each particle individually.

Finally, I tried this:

```
shader_type canvas_item;
uniform float skew_amount : hint_range(-1.0, 1.0);
void vertex() {
// Transform vertex to clip space
vec4 vertex_clip = MODEL_MATRIX * vec4(VERTEX.xy, 0.0, 1.0);
// Apply skewing using y component
vertex_clip.x += vertex_clip.y * skew_amount;
// Set vertex position (already transformed)
VERTEX = vertex_clip.xy;
}
```

But still the same result… Each particle got skewed individually…

So, how do I skew the entire particle system?