Доработка. Шейдер для простого размытия.

shaders/blur.gdshader

@@ -0,0 +1,9 @@
+// A Gaussian blur shader for Godot 4.3
+shader_type canvas_item;
+uniform sampler2D SCREEN_TEXTURE : hint_screen_texture, filter_linear_mipmap;
+uniform float lod: hint_range(0.0, 3.0) = 2.0;
+
+void fragment()
+{
+    COLOR.rgb = texture(SCREEN_TEXTURE, SCREEN_UV, lod).rgb;
+}

shaders/blur.gdshader.uid

@@ -0,0 +1 @@
+uid://qe0q7aqqbe4u