new eye damage effect (#10728)

Resources/Textures/Shaders/dim.swsl

@@ -0,0 +1,12 @@
+uniform highp float DAMAGE_AMOUNT;
+
+void fragment() {
+
+     // Higher exponent -> stronger blinding effect
+
+     // Gradually mixes between the texture mix and a full-white texture, causing the "blinding" effect
+     highp vec4 mixed = mix(vec4(1.0, 1.0, 1.0, 1.0), vec4(1.0, 1.0, 1.0, 1.0), DAMAGE_AMOUNT);
+
+     COLOR = vec4(mixed.rgb, DAMAGE_AMOUNT);
+}
+