diff --git a/drivers/gles2/rasterizer_canvas_gles2.cpp b/drivers/gles2/rasterizer_canvas_gles2.cpp
index d935c0857..bfb6f3c6a 100644
--- a/drivers/gles2/rasterizer_canvas_gles2.cpp
+++ b/drivers/gles2/rasterizer_canvas_gles2.cpp
@@ -30,8 +30,8 @@
 
 #include "rasterizer_canvas_gles2.h"
 
-#include "core/os/os.h"
 #include "core/config/project_settings.h"
+#include "core/os/os.h"
 #include "drivers/gles2/rasterizer_gles2.h"
 #include "drivers/gles_common/rasterizer_asserts.h"
 #include "rasterizer_scene_gles2.h"
@@ -1678,6 +1678,9 @@ void RasterizerCanvasGLES2::_legacy_canvas_render_item(Item *p_ci, RenderItemSta
 						case ShaderLanguage::ShaderNode::Uniform::HINT_BLACK: {
 							glBindTexture(GL_TEXTURE_2D, storage->resources.black_tex);
 						} break;
+						case ShaderLanguage::ShaderNode::Uniform::HINT_TRANSPARENT: {
+							glBindTexture(GL_TEXTURE_2D, storage->resources.transparent_tex);
+						} break;
 						case ShaderLanguage::ShaderNode::Uniform::HINT_ANISO: {
 							glBindTexture(GL_TEXTURE_2D, storage->resources.aniso_tex);
 						} break;
@@ -2040,6 +2043,9 @@ void RasterizerCanvasGLES2::render_joined_item(const BItemJoined &p_bij, RenderI
 						case ShaderLanguage::ShaderNode::Uniform::HINT_BLACK: {
 							glBindTexture(GL_TEXTURE_2D, storage->resources.black_tex);
 						} break;
+						case ShaderLanguage::ShaderNode::Uniform::HINT_TRANSPARENT: {
+							glBindTexture(GL_TEXTURE_2D, storage->resources.transparent_tex);
+						} break;
 						case ShaderLanguage::ShaderNode::Uniform::HINT_ANISO: {
 							glBindTexture(GL_TEXTURE_2D, storage->resources.aniso_tex);
 						} break;
diff --git a/drivers/gles2/rasterizer_scene_gles2.cpp b/drivers/gles2/rasterizer_scene_gles2.cpp
index de4a60357..25492dd86 100644
--- a/drivers/gles2/rasterizer_scene_gles2.cpp
+++ b/drivers/gles2/rasterizer_scene_gles2.cpp
@@ -1392,6 +1392,9 @@ bool RasterizerSceneGLES2::_setup_material(RasterizerStorageGLES2::Material *p_m
 				case ShaderLanguage::ShaderNode::Uniform::HINT_BLACK: {
 					glBindTexture(GL_TEXTURE_2D, storage->resources.black_tex);
 				} break;
+				case ShaderLanguage::ShaderNode::Uniform::HINT_TRANSPARENT: {
+					glBindTexture(GL_TEXTURE_2D, storage->resources.transparent_tex);
+				} break;
 				case ShaderLanguage::ShaderNode::Uniform::HINT_ANISO: {
 					glBindTexture(GL_TEXTURE_2D, storage->resources.aniso_tex);
 				} break;
diff --git a/drivers/gles2/rasterizer_storage_gles2.cpp b/drivers/gles2/rasterizer_storage_gles2.cpp
index 1ba6a1adf..6b423a7d5 100644
--- a/drivers/gles2/rasterizer_storage_gles2.cpp
+++ b/drivers/gles2/rasterizer_storage_gles2.cpp
@@ -30,8 +30,8 @@
 
 #include "rasterizer_storage_gles2.h"
 
-#include "core/math/transform.h"
 #include "core/config/project_settings.h"
+#include "core/math/transform.h"
 #include "rasterizer_canvas_gles2.h"
 #include "rasterizer_scene_gles2.h"
 #include "servers/visual/shader_language.h"
@@ -6096,32 +6096,45 @@ void RasterizerStorageGLES2::initialize() {
 	}
 
 	{
-		//default textures
+		// Generate default textures.
 
+		// Opaque white color.
 		glGenTextures(1, &resources.white_tex);
 		unsigned char whitetexdata[8 * 8 * 3];
 		for (int i = 0; i < 8 * 8 * 3; i++) {
 			whitetexdata[i] = 255;
 		}
-
 		glActiveTexture(GL_TEXTURE0);
 		glBindTexture(GL_TEXTURE_2D, resources.white_tex);
 		glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, 8, 8, 0, GL_RGB, GL_UNSIGNED_BYTE, whitetexdata);
 		glGenerateMipmap(GL_TEXTURE_2D);
 		glBindTexture(GL_TEXTURE_2D, 0);
 
+		// Opaque black color.
 		glGenTextures(1, &resources.black_tex);
 		unsigned char blacktexdata[8 * 8 * 3];
 		for (int i = 0; i < 8 * 8 * 3; i++) {
 			blacktexdata[i] = 0;
 		}
-
 		glActiveTexture(GL_TEXTURE0);
 		glBindTexture(GL_TEXTURE_2D, resources.black_tex);
 		glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, 8, 8, 0, GL_RGB, GL_UNSIGNED_BYTE, blacktexdata);
 		glGenerateMipmap(GL_TEXTURE_2D);
 		glBindTexture(GL_TEXTURE_2D, 0);
 
+		// Transparent black color.
+		glGenTextures(1, &resources.transparent_tex);
+		unsigned char transparenttexdata[8 * 8 * 4];
+		for (int i = 0; i < 8 * 8 * 4; i++) {
+			transparenttexdata[i] = 0;
+		}
+		glActiveTexture(GL_TEXTURE0);
+		glBindTexture(GL_TEXTURE_2D, resources.transparent_tex);
+		glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 8, 8, 0, GL_RGBA, GL_UNSIGNED_BYTE, transparenttexdata);
+		glGenerateMipmap(GL_TEXTURE_2D);
+		glBindTexture(GL_TEXTURE_2D, 0);
+
+		// Opaque "flat" normal map color.
 		glGenTextures(1, &resources.normal_tex);
 		unsigned char normaltexdata[8 * 8 * 3];
 		for (int i = 0; i < 8 * 8 * 3; i += 3) {
@@ -6129,13 +6142,13 @@ void RasterizerStorageGLES2::initialize() {
 			normaltexdata[i + 1] = 128;
 			normaltexdata[i + 2] = 255;
 		}
-
 		glActiveTexture(GL_TEXTURE0);
 		glBindTexture(GL_TEXTURE_2D, resources.normal_tex);
 		glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, 8, 8, 0, GL_RGB, GL_UNSIGNED_BYTE, normaltexdata);
 		glGenerateMipmap(GL_TEXTURE_2D);
 		glBindTexture(GL_TEXTURE_2D, 0);
 
+		// Opaque "flat" flowmap color.
 		glGenTextures(1, &resources.aniso_tex);
 		unsigned char anisotexdata[8 * 8 * 3];
 		for (int i = 0; i < 8 * 8 * 3; i += 3) {
@@ -6143,7 +6156,6 @@ void RasterizerStorageGLES2::initialize() {
 			anisotexdata[i + 1] = 128;
 			anisotexdata[i + 2] = 0;
 		}
-
 		glActiveTexture(GL_TEXTURE0);
 		glBindTexture(GL_TEXTURE_2D, resources.aniso_tex);
 		glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, 8, 8, 0, GL_RGB, GL_UNSIGNED_BYTE, anisotexdata);
diff --git a/drivers/gles2/rasterizer_storage_gles2.h b/drivers/gles2/rasterizer_storage_gles2.h
index 408932f16..61853a23d 100644
--- a/drivers/gles2/rasterizer_storage_gles2.h
+++ b/drivers/gles2/rasterizer_storage_gles2.h
@@ -109,6 +109,7 @@ public:
 	struct Resources {
 		GLuint white_tex;
 		GLuint black_tex;
+		GLuint transparent_tex;
 		GLuint normal_tex;
 		GLuint aniso_tex;
 
diff --git a/servers/visual/shader_language.h b/servers/visual/shader_language.h
index 48e953d6b..555c5df1f 100644
--- a/servers/visual/shader_language.h
+++ b/servers/visual/shader_language.h
@@ -35,8 +35,8 @@
 #include "core/containers/ordered_hash_map.h"
 #include "core/object/script_language.h"
 #include "core/string/string_name.h"
-#include "core/typedefs.h"
 #include "core/string/ustring.h"
+#include "core/typedefs.h"
 #include "core/variant/variant.h"
 
 class ShaderLanguage {
@@ -156,6 +156,7 @@ public:
 		TK_RENDER_MODE,
 		TK_HINT_WHITE_TEXTURE,
 		TK_HINT_BLACK_TEXTURE,
+		TK_HINT_TRANSPARENT_TEXTURE,
 		TK_HINT_NORMAL_TEXTURE,
 		TK_HINT_ANISO_TEXTURE,
 		TK_HINT_ALBEDO_TEXTURE,
@@ -642,6 +643,7 @@ public:
 				HINT_NORMAL,
 				HINT_BLACK,
 				HINT_WHITE,
+				HINT_TRANSPARENT,
 				HINT_ANISO,
 				HINT_MAX
 			};