Work on shiny shader and updated to RC5

shaders/item_shine.gdshader

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+shader_type canvas_item;
+render_mode blend_premul_alpha;
+
+uniform float Line_Smoothness : hint_range(0, 0.1) = 0.045;
+uniform float Line_Width : hint_range(0, 0.2) = 0.09;
+uniform float Brightness = 3.0;
+uniform float Rotation_deg : hint_range(-90, 90) = 30;
+uniform float Distortion : hint_range(1, 2) = 1.8;
+uniform float Speed = 0.7;
+uniform float Position : hint_range(0, 1) = 0;
+uniform float Position_Min = 0.25;
+uniform float Position_Max = 0.5;
+uniform float Alpha : hint_range(0, 1) = 1;
+
+vec2 rotate_uv(vec2 uv, vec2 center, float rotation, bool use_degrees){
+		float _angle = rotation;
+		if(use_degrees){
+			_angle = rotation * (3.1415926/180.0);
+		}
+		mat2 _rotation = mat2(
+			vec2(cos(_angle), -sin(_angle)),
+			vec2(sin(_angle), cos(_angle))
+		);
+		vec2 _delta = uv - center;
+		_delta = _rotation * _delta;
+		return _delta + center;
+	}
+
+void fragment() {
+
+	vec2 center_uv = UV - vec2(0.5, 0.5);
+	float gradient_to_edge = max(abs(center_uv.x), abs(center_uv.y));
+	gradient_to_edge = gradient_to_edge * Distortion;
+	gradient_to_edge = 1.0 - gradient_to_edge;
+	vec2 rotaded_uv = rotate_uv(UV, vec2(0.5, 0.5), Rotation_deg, true);
+
+	float remapped_position;
+	{
+		float output_range = Position_Max - Position_Min;
+		remapped_position = Position_Min + output_range * Position;
+	}
+
+	float remapped_time = TIME * Speed + remapped_position;
+	remapped_time = fract(remapped_time);
+	{
+		float output_range = 2.0 - (-2.0);
+		remapped_time = -2.0 + output_range * remapped_time;
+	}
+
+	vec2 offset_uv = vec2(rotaded_uv.xy) + vec2(remapped_time, 0.0);
+	float line = vec3(offset_uv, 0.0).x;
+	line = abs(line);
+	line = gradient_to_edge * line;
+	line = sqrt(line);
+
+	float line_smoothness = clamp(Line_Smoothness, 0.001, 1.0);
+	float offset_plus = Line_Width + line_smoothness;
+	float offset_minus = Line_Width - line_smoothness;
+
+	float remapped_line;
+	{
+		float input_range = offset_minus - offset_plus;
+		remapped_line = (line - offset_plus) / input_range;
+	}
+	remapped_line = remapped_line * Brightness;
+	remapped_line = min(remapped_line, Alpha);
+	COLOR.rgb = vec3(COLOR.xyz) * vec3(remapped_line);
+	COLOR.a = remapped_line;
+}

shaders/item_shine.gdshader.uid

@@ -0,0 +1 @@
+uid://cuicvb6logcpd