1 files changed, 18 insertions, 3 deletions

diff --git a/scene/resources/material.cpp b/scene/resources/material.cpp
index 5586116734..ada0ac07a3 100644
--- a/scene/resources/material.cpp
+++ b/scene/resources/material.cpp
@@ -30,6 +30,10 @@
 
 #include "material.h"
 
+#ifdef TOOLS_ENABLED
+#include "editor/editor_settings.h"
+#endif
+
 #include "scene/scene_string_names.h"
 
 void Material::set_next_pass(const Ref<Material> &p_pass) {
@@ -241,6 +245,12 @@ void ShaderMaterial::_bind_methods() {
 
 void ShaderMaterial::get_argument_options(const StringName &p_function, int p_idx, List<String> *r_options) const {
 
+#ifdef TOOLS_ENABLED
+	const String quote_style = EDITOR_DEF("text_editor/completion/use_single_quotes", 0) ? "'" : "\"";
+#else
+	const String quote_style = "\"";
+#endif
+
 	String f = p_function.operator String();
 	if ((f == "get_shader_param" || f == "set_shader_param") && p_idx == 0) {
 
@@ -248,7 +258,7 @@ void ShaderMaterial::get_argument_options(const StringName &p_function, int p_id
 			List<PropertyInfo> pl;
 			shader->get_param_list(&pl);
 			for (List<PropertyInfo>::Element *E = pl.front(); E; E = E->next()) {
-				r_options->push_back("\"" + E->get().name.replace_first("shader_param/", "") + "\"");
+				r_options->push_back(quote_style + E->get().name.replace_first("shader_param/", "") + quote_style);
 			}
 		}
 	}
@@ -463,6 +473,9 @@ void SpatialMaterial::_update_shader() {
 	if (flags[FLAG_ENSURE_CORRECT_NORMALS]) {
 		code += ",ensure_correct_normals";
 	}
+	if (flags[FLAG_USE_SHADOW_TO_OPACITY]) {
+		code += ",shadow_to_opacity";
+	}
 	code += ";\n";
 
 	code += "uniform vec4 albedo : hint_color;\n";
@@ -844,7 +857,7 @@ void SpatialMaterial::_update_shader() {
 		code += "\tALBEDO *= 1.0 - ref_amount;\n";
 		code += "\tALPHA = 1.0;\n";
 
-	} else if (features[FEATURE_TRANSPARENT] || flags[FLAG_USE_ALPHA_SCISSOR] || (distance_fade == DISTANCE_FADE_PIXEL_ALPHA) || proximity_fade_enabled) {
+	} else if (features[FEATURE_TRANSPARENT] || flags[FLAG_USE_ALPHA_SCISSOR] || flags[FLAG_USE_SHADOW_TO_OPACITY] || (distance_fade == DISTANCE_FADE_PIXEL_ALPHA) || proximity_fade_enabled) {
 		code += "\tALPHA = albedo.a * albedo_tex.a;\n";
 	}
 
@@ -1344,7 +1357,7 @@ void SpatialMaterial::set_flag(Flags p_flag, bool p_enabled) {
 		return;
 
 	flags[p_flag] = p_enabled;
-	if (p_flag == FLAG_USE_ALPHA_SCISSOR || p_flag == FLAG_UNSHADED) {
+	if ((p_flag == FLAG_USE_ALPHA_SCISSOR) || (p_flag == FLAG_UNSHADED) || (p_flag == FLAG_USE_SHADOW_TO_OPACITY)) {
 		_change_notify();
 	}
 	_queue_shader_change();
@@ -2055,6 +2068,7 @@ void SpatialMaterial::_bind_methods() {
 
 	ADD_GROUP("Flags", "flags_");
 	ADD_PROPERTYI(PropertyInfo(Variant::BOOL, "flags_transparent"), "set_feature", "get_feature", FEATURE_TRANSPARENT);
+	ADD_PROPERTYI(PropertyInfo(Variant::BOOL, "flags_use_shadow_to_opacity"), "set_flag", "get_flag", FLAG_USE_SHADOW_TO_OPACITY);
 	ADD_PROPERTYI(PropertyInfo(Variant::BOOL, "flags_unshaded"), "set_flag", "get_flag", FLAG_UNSHADED);
 	ADD_PROPERTYI(PropertyInfo(Variant::BOOL, "flags_vertex_lighting"), "set_flag", "get_flag", FLAG_USE_VERTEX_LIGHTING);
 	ADD_PROPERTYI(PropertyInfo(Variant::BOOL, "flags_no_depth_test"), "set_flag", "get_flag", FLAG_DISABLE_DEPTH_TEST);
@@ -2261,6 +2275,7 @@ void SpatialMaterial::_bind_methods() {
 	BIND_ENUM_CONSTANT(FLAG_DONT_RECEIVE_SHADOWS);
 	BIND_ENUM_CONSTANT(FLAG_DISABLE_AMBIENT_LIGHT);
 	BIND_ENUM_CONSTANT(FLAG_ENSURE_CORRECT_NORMALS);
+	BIND_ENUM_CONSTANT(FLAG_USE_SHADOW_TO_OPACITY);
 	BIND_ENUM_CONSTANT(FLAG_MAX);
 
 	BIND_ENUM_CONSTANT(DIFFUSE_BURLEY);