Honour transparency of teleport beam color in shader.

addons/godot-xr-tools/materials/teleport.gdshader

@@ -11,17 +11,17 @@ void vertex() {
 	// offset our Z so we're projecting from our origin point
 	VERTEX.z -= 0.5;
 	VERTEX.z *= length;
-	
+
 	// now use that to create our arch
 	float t = VERTEX.z * scale_t;
 	float t2 = t * t;
 
 	// translate to our world vector
-	VERTEX = (MODEL_MATRIX * vec4(VERTEX, 1.0)).xyz; 
-	
+	VERTEX = (MODEL_MATRIX * vec4(VERTEX, 1.0)).xyz;
+
 	// and now create our arch
 	VERTEX += down * t2;
-	
+
 	// and apply our view matrix
 	VERTEX = (VIEW_MATRIX * vec4(VERTEX, 1.0)).xyz;
 }
@@ -31,7 +31,7 @@ void fragment() {
 	float offset =  (TIME * 2.0);
 	vec4 col = texture(arrow_texture, vec2(UV.x, (UV.y * length * 4.0) + offset )).rgba;
 	ALBEDO = col.rgb * mix_color.rgb;
-	
+
 	// need to fix up our image and add an alpha channel
-	ALPHA = col.a;
+	ALPHA = min(col.a, mix_color.a);
 }