Fix unsafe murmur3 hash use for the default material keys, expose alpha hash transparency mode for default materials and Label3D and Sprite3D.

doc/classes/Label3D.xml

@@ -35,6 +35,9 @@
 		<member name="alpha_cut" type="int" setter="set_alpha_cut_mode" getter="get_alpha_cut_mode" enum="Label3D.AlphaCutMode" default="0">
 			The alpha cutting mode to use for the sprite. See [enum AlphaCutMode] for possible values.
 		</member>
+		<member name="alpha_hash_scale" type="float" setter="set_alpha_hash_scale" getter="get_alpha_hash_scale" default="1.0">
+			The hashing scale for Alpha Hash. Recommended values between [code]0[/code] and [code]2[/code].
+		</member>
 		<member name="alpha_scissor_threshold" type="float" setter="set_alpha_scissor_threshold" getter="get_alpha_scissor_threshold" default="0.5">
 			Threshold at which the alpha scissor will discard values.
 		</member>
@@ -152,5 +155,8 @@
 			This mode draws fully opaque pixels in the depth prepass. This is slower than [constant ALPHA_CUT_DISABLED] or [constant ALPHA_CUT_DISCARD], but it allows displaying translucent areas and smooth edges while using proper sorting.
 			[b]Note:[/b] When using text with overlapping glyphs (e.g., cursive scripts), this mode might have transparency sorting issues between the main text and the outline.
 		</constant>
+		<constant name="ALPHA_CUT_HASH" value="3" enum="AlphaCutMode">
+			This mode draws cuts off all values below a spatially-deterministic threshold, the rest will remain opaque.
+		</constant>
 	</constants>
 </class>

doc/classes/SpriteBase3D.xml

@@ -41,6 +41,12 @@
 		<member name="alpha_cut" type="int" setter="set_alpha_cut_mode" getter="get_alpha_cut_mode" enum="SpriteBase3D.AlphaCutMode" default="0">
 			The alpha cutting mode to use for the sprite. See [enum AlphaCutMode] for possible values.
 		</member>
+		<member name="alpha_hash_scale" type="float" setter="set_alpha_hash_scale" getter="get_alpha_hash_scale" default="1.0">
+			The hashing scale for Alpha Hash. Recommended values between [code]0[/code] and [code]2[/code].
+		</member>
+		<member name="alpha_scissor_threshold" type="float" setter="set_alpha_scissor_threshold" getter="get_alpha_scissor_threshold" default="0.5">
+			Threshold at which the alpha scissor will discard values.
+		</member>
 		<member name="axis" type="int" setter="set_axis" getter="get_axis" enum="Vector3.Axis" default="2">
 			The direction in which the front of the texture faces.
 		</member>
@@ -118,5 +124,8 @@
 		<constant name="ALPHA_CUT_OPAQUE_PREPASS" value="2" enum="AlphaCutMode">
 			This mode draws fully opaque pixels in the depth prepass. This is slower than [constant ALPHA_CUT_DISABLED] or [constant ALPHA_CUT_DISCARD], but it allows displaying translucent areas and smooth edges while using proper sorting.
 		</constant>
+		<constant name="ALPHA_CUT_HASH" value="3" enum="AlphaCutMode">
+			This mode draws cuts off all values below a spatially-deterministic threshold, the rest will remain opaque.
+		</constant>
 	</constants>
 </class>

scene/3d/label_3d.cpp

@@ -109,6 +109,9 @@ void Label3D::_bind_methods() {
 	ClassDB::bind_method(D_METHOD("set_alpha_scissor_threshold", "threshold"), &Label3D::set_alpha_scissor_threshold);
 	ClassDB::bind_method(D_METHOD("get_alpha_scissor_threshold"), &Label3D::get_alpha_scissor_threshold);
 
+	ClassDB::bind_method(D_METHOD("set_alpha_hash_scale", "threshold"), &Label3D::set_alpha_hash_scale);
+	ClassDB::bind_method(D_METHOD("get_alpha_hash_scale"), &Label3D::get_alpha_hash_scale);
+
 	ClassDB::bind_method(D_METHOD("set_texture_filter", "mode"), &Label3D::set_texture_filter);
 	ClassDB::bind_method(D_METHOD("get_texture_filter"), &Label3D::get_texture_filter);
 
@@ -127,8 +130,9 @@ void Label3D::_bind_methods() {
 	ADD_PROPERTYI(PropertyInfo(Variant::BOOL, "double_sided"), "set_draw_flag", "get_draw_flag", FLAG_DOUBLE_SIDED);
 	ADD_PROPERTYI(PropertyInfo(Variant::BOOL, "no_depth_test"), "set_draw_flag", "get_draw_flag", FLAG_DISABLE_DEPTH_TEST);
 	ADD_PROPERTYI(PropertyInfo(Variant::BOOL, "fixed_size"), "set_draw_flag", "get_draw_flag", FLAG_FIXED_SIZE);
-	ADD_PROPERTY(PropertyInfo(Variant::INT, "alpha_cut", PROPERTY_HINT_ENUM, "Disabled,Discard,Opaque Pre-Pass"), "set_alpha_cut_mode", "get_alpha_cut_mode");
+	ADD_PROPERTY(PropertyInfo(Variant::INT, "alpha_cut", PROPERTY_HINT_ENUM, "Disabled,Discard,Opaque Pre-Pass,Alpha Hash"), "set_alpha_cut_mode", "get_alpha_cut_mode");
 	ADD_PROPERTY(PropertyInfo(Variant::FLOAT, "alpha_scissor_threshold", PROPERTY_HINT_RANGE, "0,1,0.001"), "set_alpha_scissor_threshold", "get_alpha_scissor_threshold");
+	ADD_PROPERTY(PropertyInfo(Variant::FLOAT, "alpha_hash_scale", PROPERTY_HINT_RANGE, "0,2,0.01"), "set_alpha_hash_scale", "get_alpha_hash_scale");
 	ADD_PROPERTY(PropertyInfo(Variant::INT, "texture_filter", PROPERTY_HINT_ENUM, "Nearest,Linear,Nearest Mipmap,Linear Mipmap,Nearest Mipmap Anisotropic,Linear Mipmap Anisotropic"), "set_texture_filter", "get_texture_filter");
 	ADD_PROPERTY(PropertyInfo(Variant::INT, "render_priority", PROPERTY_HINT_RANGE, itos(RS::MATERIAL_RENDER_PRIORITY_MIN) + "," + itos(RS::MATERIAL_RENDER_PRIORITY_MAX) + ",1"), "set_render_priority", "get_render_priority");
 	ADD_PROPERTY(PropertyInfo(Variant::INT, "outline_render_priority", PROPERTY_HINT_RANGE, itos(RS::MATERIAL_RENDER_PRIORITY_MIN) + "," + itos(RS::MATERIAL_RENDER_PRIORITY_MAX) + ",1"), "set_outline_render_priority", "get_outline_render_priority");
@@ -162,6 +166,7 @@ void Label3D::_bind_methods() {
 	BIND_ENUM_CONSTANT(ALPHA_CUT_DISABLED);
 	BIND_ENUM_CONSTANT(ALPHA_CUT_DISCARD);
 	BIND_ENUM_CONSTANT(ALPHA_CUT_OPAQUE_PREPASS);
+	BIND_ENUM_CONSTANT(ALPHA_CUT_HASH);
 }
 
 void Label3D::_validate_property(PropertyInfo &p_property) const {
@@ -350,13 +355,23 @@ void Label3D::_generate_glyph_surfaces(const Glyph &p_glyph, Vector2 &r_offset,
 			RS::get_singleton()->material_set_param(surf.material, "uv2_offset", Vector3(0, 0, 0));
 			RS::get_singleton()->material_set_param(surf.material, "uv2_scale", Vector3(1, 1, 1));
 			RS::get_singleton()->material_set_param(surf.material, "alpha_scissor_threshold", alpha_scissor_threshold);
+			RS::get_singleton()->material_set_param(surf.material, "alpha_hash_scale", alpha_hash_scale);
 			if (msdf) {
 				RS::get_singleton()->material_set_param(surf.material, "msdf_pixel_range", TS->font_get_msdf_pixel_range(p_glyph.font_rid));
 				RS::get_singleton()->material_set_param(surf.material, "msdf_outline_size", p_outline_size);
 			}
 
+			BaseMaterial3D::Transparency mat_transparency = BaseMaterial3D::Transparency::TRANSPARENCY_ALPHA;
+			if (get_alpha_cut_mode() == ALPHA_CUT_DISCARD) {
+				mat_transparency = BaseMaterial3D::Transparency::TRANSPARENCY_ALPHA_SCISSOR;
+			} else if (get_alpha_cut_mode() == ALPHA_CUT_OPAQUE_PREPASS) {
+				mat_transparency = BaseMaterial3D::Transparency::TRANSPARENCY_ALPHA_DEPTH_PRE_PASS;
+			} else if (get_alpha_cut_mode() == ALPHA_CUT_HASH) {
+				mat_transparency = BaseMaterial3D::Transparency::TRANSPARENCY_ALPHA_HASH;
+			}
+
 			RID shader_rid;
-			StandardMaterial3D::get_material_for_2d(get_draw_flag(FLAG_SHADED), true, get_draw_flag(FLAG_DOUBLE_SIDED), get_alpha_cut_mode() == ALPHA_CUT_DISCARD, get_alpha_cut_mode() == ALPHA_CUT_OPAQUE_PREPASS, get_billboard_mode() == StandardMaterial3D::BILLBOARD_ENABLED, get_billboard_mode() == StandardMaterial3D::BILLBOARD_FIXED_Y, msdf, get_draw_flag(FLAG_DISABLE_DEPTH_TEST), get_draw_flag(FLAG_FIXED_SIZE), texture_filter, &shader_rid);
+			StandardMaterial3D::get_material_for_2d(get_draw_flag(FLAG_SHADED), mat_transparency, get_draw_flag(FLAG_DOUBLE_SIDED), get_billboard_mode() == StandardMaterial3D::BILLBOARD_ENABLED, get_billboard_mode() == StandardMaterial3D::BILLBOARD_FIXED_Y, msdf, get_draw_flag(FLAG_DISABLE_DEPTH_TEST), get_draw_flag(FLAG_FIXED_SIZE), texture_filter, &shader_rid);
 
 			RS::get_singleton()->material_set_shader(surf.material, shader_rid);
 			RS::get_singleton()->material_set_param(surf.material, "texture_albedo", tex);
@@ -906,7 +921,7 @@ StandardMaterial3D::BillboardMode Label3D::get_billboard_mode() const {
 }
 
 void Label3D::set_alpha_cut_mode(AlphaCutMode p_mode) {
-	ERR_FAIL_INDEX(p_mode, 3);
+	ERR_FAIL_INDEX(p_mode, ALPHA_CUT_MAX);
 	if (alpha_cut != p_mode) {
 		alpha_cut = p_mode;
 		_queue_update();
@@ -929,6 +944,17 @@ Label3D::AlphaCutMode Label3D::get_alpha_cut_mode() const {
 	return alpha_cut;
 }
 
+void Label3D::set_alpha_hash_scale(float p_hash_scale) {
+	if (alpha_hash_scale != p_hash_scale) {
+		alpha_hash_scale = p_hash_scale;
+		_queue_update();
+	}
+}
+
+float Label3D::get_alpha_hash_scale() const {
+	return alpha_hash_scale;
+}
+
 void Label3D::set_alpha_scissor_threshold(float p_threshold) {
 	if (alpha_scissor_threshold != p_threshold) {
 		alpha_scissor_threshold = p_threshold;

scene/3d/label_3d.h

@@ -51,7 +51,9 @@ public:
 	enum AlphaCutMode {
 		ALPHA_CUT_DISABLED,
 		ALPHA_CUT_DISCARD,
-		ALPHA_CUT_OPAQUE_PREPASS
+		ALPHA_CUT_OPAQUE_PREPASS,
+		ALPHA_CUT_HASH,
+		ALPHA_CUT_MAX
 	};
 
 private:
@@ -59,6 +61,7 @@ private:
 	bool flags[FLAG_MAX] = {};
 	AlphaCutMode alpha_cut = ALPHA_CUT_DISABLED;
 	float alpha_scissor_threshold = 0.5;
+	float alpha_hash_scale = 1.0;
 
 	AABB aabb;
 
@@ -228,6 +231,9 @@ public:
 	void set_alpha_scissor_threshold(float p_threshold);
 	float get_alpha_scissor_threshold() const;
 
+	void set_alpha_hash_scale(float p_hash_scale);
+	float get_alpha_hash_scale() const;
+
 	void set_billboard_mode(StandardMaterial3D::BillboardMode p_mode);
 	StandardMaterial3D::BillboardMode get_billboard_mode() const;
 

scene/3d/sprite_3d.cpp

@@ -245,8 +245,25 @@ void SpriteBase3D::draw_texture_rect(Ref<Texture2D> p_texture, Rect2 p_dst_rect,
 	RS::get_singleton()->mesh_set_custom_aabb(mesh_new, aabb_new);
 	set_aabb(aabb_new);
 
+	RS::get_singleton()->material_set_param(get_material(), "alpha_scissor_threshold", alpha_scissor_threshold);
+	RS::get_singleton()->material_set_param(get_material(), "alpha_hash_scale", alpha_hash_scale);
+
+	BaseMaterial3D::Transparency mat_transparency = BaseMaterial3D::Transparency::TRANSPARENCY_DISABLED;
+	if (get_draw_flag(FLAG_TRANSPARENT)) {
+		if (get_alpha_cut_mode() == ALPHA_CUT_DISCARD) {
+			mat_transparency = BaseMaterial3D::Transparency::TRANSPARENCY_ALPHA_SCISSOR;
+		} else if (get_alpha_cut_mode() == ALPHA_CUT_OPAQUE_PREPASS) {
+			mat_transparency = BaseMaterial3D::Transparency::TRANSPARENCY_ALPHA_DEPTH_PRE_PASS;
+		} else if (get_alpha_cut_mode() == ALPHA_CUT_HASH) {
+			mat_transparency = BaseMaterial3D::Transparency::TRANSPARENCY_ALPHA_HASH;
+		} else {
+			mat_transparency = BaseMaterial3D::Transparency::TRANSPARENCY_ALPHA;
+		}
+	}
+
 	RID shader_rid;
-	StandardMaterial3D::get_material_for_2d(get_draw_flag(FLAG_SHADED), get_draw_flag(FLAG_TRANSPARENT), get_draw_flag(FLAG_DOUBLE_SIDED), get_alpha_cut_mode() == ALPHA_CUT_DISCARD, get_alpha_cut_mode() == ALPHA_CUT_OPAQUE_PREPASS, get_billboard_mode() == StandardMaterial3D::BILLBOARD_ENABLED, get_billboard_mode() == StandardMaterial3D::BILLBOARD_FIXED_Y, false, get_draw_flag(FLAG_DISABLE_DEPTH_TEST), get_draw_flag(FLAG_FIXED_SIZE), get_texture_filter(), &shader_rid);
+	StandardMaterial3D::get_material_for_2d(get_draw_flag(FLAG_SHADED), mat_transparency, get_draw_flag(FLAG_DOUBLE_SIDED), get_billboard_mode() == StandardMaterial3D::BILLBOARD_ENABLED, get_billboard_mode() == StandardMaterial3D::BILLBOARD_FIXED_Y, false, get_draw_flag(FLAG_DISABLE_DEPTH_TEST), get_draw_flag(FLAG_FIXED_SIZE), get_texture_filter(), &shader_rid);
+
 	if (last_shader != shader_rid) {
 		RS::get_singleton()->material_set_shader(get_material(), shader_rid);
 		last_shader = shader_rid;
@@ -433,7 +450,7 @@ bool SpriteBase3D::get_draw_flag(DrawFlags p_flag) const {
 }
 
 void SpriteBase3D::set_alpha_cut_mode(AlphaCutMode p_mode) {
-	ERR_FAIL_INDEX(p_mode, 3);
+	ERR_FAIL_INDEX(p_mode, ALPHA_CUT_MAX);
 	alpha_cut = p_mode;
 	_queue_redraw();
 }
@@ -442,6 +459,28 @@ SpriteBase3D::AlphaCutMode SpriteBase3D::get_alpha_cut_mode() const {
 	return alpha_cut;
 }
 
+void SpriteBase3D::set_alpha_hash_scale(float p_hash_scale) {
+	if (alpha_hash_scale != p_hash_scale) {
+		alpha_hash_scale = p_hash_scale;
+		_queue_redraw();
+	}
+}
+
+float SpriteBase3D::get_alpha_hash_scale() const {
+	return alpha_hash_scale;
+}
+
+void SpriteBase3D::set_alpha_scissor_threshold(float p_threshold) {
+	if (alpha_scissor_threshold != p_threshold) {
+		alpha_scissor_threshold = p_threshold;
+		_queue_redraw();
+	}
+}
+
+float SpriteBase3D::get_alpha_scissor_threshold() const {
+	return alpha_scissor_threshold;
+}
+
 void SpriteBase3D::set_billboard_mode(StandardMaterial3D::BillboardMode p_mode) {
 	ERR_FAIL_INDEX(p_mode, 3); // Cannot use BILLBOARD_PARTICLES.
 	billboard_mode = p_mode;
@@ -494,6 +533,12 @@ void SpriteBase3D::_bind_methods() {
 	ClassDB::bind_method(D_METHOD("set_alpha_cut_mode", "mode"), &SpriteBase3D::set_alpha_cut_mode);
 	ClassDB::bind_method(D_METHOD("get_alpha_cut_mode"), &SpriteBase3D::get_alpha_cut_mode);
 
+	ClassDB::bind_method(D_METHOD("set_alpha_scissor_threshold", "threshold"), &SpriteBase3D::set_alpha_scissor_threshold);
+	ClassDB::bind_method(D_METHOD("get_alpha_scissor_threshold"), &SpriteBase3D::get_alpha_scissor_threshold);
+
+	ClassDB::bind_method(D_METHOD("set_alpha_hash_scale", "threshold"), &SpriteBase3D::set_alpha_hash_scale);
+	ClassDB::bind_method(D_METHOD("get_alpha_hash_scale"), &SpriteBase3D::get_alpha_hash_scale);
+
 	ClassDB::bind_method(D_METHOD("set_billboard_mode", "mode"), &SpriteBase3D::set_billboard_mode);
 	ClassDB::bind_method(D_METHOD("get_billboard_mode"), &SpriteBase3D::get_billboard_mode);
 
@@ -519,7 +564,9 @@ void SpriteBase3D::_bind_methods() {
 	ADD_PROPERTYI(PropertyInfo(Variant::BOOL, "double_sided"), "set_draw_flag", "get_draw_flag", FLAG_DOUBLE_SIDED);
 	ADD_PROPERTYI(PropertyInfo(Variant::BOOL, "no_depth_test"), "set_draw_flag", "get_draw_flag", FLAG_DISABLE_DEPTH_TEST);
 	ADD_PROPERTYI(PropertyInfo(Variant::BOOL, "fixed_size"), "set_draw_flag", "get_draw_flag", FLAG_FIXED_SIZE);
-	ADD_PROPERTY(PropertyInfo(Variant::INT, "alpha_cut", PROPERTY_HINT_ENUM, "Disabled,Discard,Opaque Pre-Pass"), "set_alpha_cut_mode", "get_alpha_cut_mode");
+	ADD_PROPERTY(PropertyInfo(Variant::INT, "alpha_cut", PROPERTY_HINT_ENUM, "Disabled,Discard,Opaque Pre-Pass,Alpha Hash"), "set_alpha_cut_mode", "get_alpha_cut_mode");
+	ADD_PROPERTY(PropertyInfo(Variant::FLOAT, "alpha_scissor_threshold", PROPERTY_HINT_RANGE, "0,1,0.001"), "set_alpha_scissor_threshold", "get_alpha_scissor_threshold");
+	ADD_PROPERTY(PropertyInfo(Variant::FLOAT, "alpha_hash_scale", PROPERTY_HINT_RANGE, "0,2,0.01"), "set_alpha_hash_scale", "get_alpha_hash_scale");
 	ADD_PROPERTY(PropertyInfo(Variant::INT, "texture_filter", PROPERTY_HINT_ENUM, "Nearest,Linear,Nearest Mipmap,Linear Mipmap,Nearest Mipmap Anisotropic,Linear Mipmap Anisotropic"), "set_texture_filter", "get_texture_filter");
 	ADD_PROPERTY(PropertyInfo(Variant::INT, "render_priority", PROPERTY_HINT_RANGE, itos(RS::MATERIAL_RENDER_PRIORITY_MIN) + "," + itos(RS::MATERIAL_RENDER_PRIORITY_MAX) + ",1"), "set_render_priority", "get_render_priority");
 
@@ -533,6 +580,7 @@ void SpriteBase3D::_bind_methods() {
 	BIND_ENUM_CONSTANT(ALPHA_CUT_DISABLED);
 	BIND_ENUM_CONSTANT(ALPHA_CUT_DISCARD);
 	BIND_ENUM_CONSTANT(ALPHA_CUT_OPAQUE_PREPASS);
+	BIND_ENUM_CONSTANT(ALPHA_CUT_HASH);
 }
 
 SpriteBase3D::SpriteBase3D() {
@@ -550,7 +598,6 @@ SpriteBase3D::SpriteBase3D() {
 	RS::get_singleton()->material_set_param(material, "uv1_scale", Vector3(1, 1, 1));
 	RS::get_singleton()->material_set_param(material, "uv2_offset", Vector3(0, 0, 0));
 	RS::get_singleton()->material_set_param(material, "uv2_scale", Vector3(1, 1, 1));
-	RS::get_singleton()->material_set_param(material, "alpha_scissor_threshold", 0.5);
 
 	mesh = RenderingServer::get_singleton()->mesh_create();
 

scene/3d/sprite_3d.h

@@ -53,7 +53,9 @@ public:
 	enum AlphaCutMode {
 		ALPHA_CUT_DISABLED,
 		ALPHA_CUT_DISCARD,
-		ALPHA_CUT_OPAQUE_PREPASS
+		ALPHA_CUT_OPAQUE_PREPASS,
+		ALPHA_CUT_HASH,
+		ALPHA_CUT_MAX
 	};
 
 private:
@@ -85,6 +87,8 @@ private:
 
 	bool flags[FLAG_MAX] = {};
 	AlphaCutMode alpha_cut = ALPHA_CUT_DISABLED;
+	float alpha_scissor_threshold = 0.5;
+	float alpha_hash_scale = 1.0;
 	StandardMaterial3D::BillboardMode billboard_mode = StandardMaterial3D::BILLBOARD_DISABLED;
 	StandardMaterial3D::TextureFilter texture_filter = StandardMaterial3D::TEXTURE_FILTER_LINEAR_WITH_MIPMAPS;
 	bool pending_update = false;
@@ -143,6 +147,12 @@ public:
 	void set_alpha_cut_mode(AlphaCutMode p_mode);
 	AlphaCutMode get_alpha_cut_mode() const;
 
+	void set_alpha_scissor_threshold(float p_threshold);
+	float get_alpha_scissor_threshold() const;
+
+	void set_alpha_hash_scale(float p_hash_scale);
+	float get_alpha_hash_scale() const;
+
 	void set_billboard_mode(StandardMaterial3D::BillboardMode p_mode);
 	StandardMaterial3D::BillboardMode get_billboard_mode() const;
 

scene/animation/root_motion_view.cpp

@@ -80,7 +80,8 @@ bool RootMotionView::get_zero_y() const {
 void RootMotionView::_notification(int p_what) {
 	switch (p_what) {
 		case NOTIFICATION_ENTER_TREE: {
-			immediate_material = StandardMaterial3D::get_material_for_2d(false, true, false, false, false);
+			immediate_material = StandardMaterial3D::get_material_for_2d(false, BaseMaterial3D::TRANSPARENCY_ALPHA, false);
+
 			first = true;
 		} break;
 

scene/resources/material.cpp

@@ -2316,52 +2316,30 @@ BaseMaterial3D::TextureChannel BaseMaterial3D::get_refraction_texture_channel()
 	return refraction_texture_channel;
 }
 
-Ref<Material> BaseMaterial3D::get_material_for_2d(bool p_shaded, bool p_transparent, bool p_double_sided, bool p_cut_alpha, bool p_opaque_prepass, bool p_billboard, bool p_billboard_y, bool p_msdf, bool p_no_depth, bool p_fixed_size, TextureFilter p_filter, RID *r_shader_rid) {
+Ref<Material> BaseMaterial3D::get_material_for_2d(bool p_shaded, Transparency p_transparency, bool p_double_sided, bool p_billboard, bool p_billboard_y, bool p_msdf, bool p_no_depth, bool p_fixed_size, TextureFilter p_filter, RID *r_shader_rid) {
-	int64_t hash = 0;
+	uint64_t key = 0;
-	if (p_shaded) {
+	key |= ((int8_t)p_shaded & 0x01) << 0;
-		hash |= 1 << 0;
+	key |= ((int8_t)p_transparency & 0x07) << 1; // Bits 1-3.
-	}
+	key |= ((int8_t)p_double_sided & 0x01) << 4;
-	if (p_transparent) {
+	key |= ((int8_t)p_billboard & 0x01) << 5;
-		hash |= 1 << 1;
+	key |= ((int8_t)p_billboard_y & 0x01) << 6;
-	}
+	key |= ((int8_t)p_msdf & 0x01) << 7;
-	if (p_cut_alpha) {
+	key |= ((int8_t)p_no_depth & 0x01) << 8;
-		hash |= 1 << 2;
+	key |= ((int8_t)p_fixed_size & 0x01) << 9;
-	}
+	key |= ((int8_t)p_filter & 0x07) << 10; // Bits 10-13.
-	if (p_opaque_prepass) {
-		hash |= 1 << 3;
-	}
-	if (p_double_sided) {
-		hash |= 1 << 4;
-	}
-	if (p_billboard) {
-		hash |= 1 << 5;
-	}
-	if (p_billboard_y) {
-		hash |= 1 << 6;
-	}
-	if (p_msdf) {
-		hash |= 1 << 7;
-	}
-	if (p_no_depth) {
-		hash |= 1 << 8;
-	}
-	if (p_fixed_size) {
-		hash |= 1 << 9;
-	}
-	hash = hash_murmur3_one_64(p_filter, hash);
 
-	if (materials_for_2d.has(hash)) {
+	if (materials_for_2d.has(key)) {
 		if (r_shader_rid) {
-			*r_shader_rid = materials_for_2d[hash]->get_shader_rid();
+			*r_shader_rid = materials_for_2d[key]->get_shader_rid();
 		}
-		return materials_for_2d[hash];
+		return materials_for_2d[key];
 	}
 
 	Ref<StandardMaterial3D> material;
 	material.instantiate();
 
 	material->set_shading_mode(p_shaded ? SHADING_MODE_PER_PIXEL : SHADING_MODE_UNSHADED);
-	material->set_transparency(p_transparent ? (p_opaque_prepass ? TRANSPARENCY_ALPHA_DEPTH_PRE_PASS : (p_cut_alpha ? TRANSPARENCY_ALPHA_SCISSOR : TRANSPARENCY_ALPHA)) : TRANSPARENCY_DISABLED);
+	material->set_transparency(p_transparency);
 	material->set_cull_mode(p_double_sided ? CULL_DISABLED : CULL_BACK);
 	material->set_flag(FLAG_SRGB_VERTEX_COLOR, true);
 	material->set_flag(FLAG_ALBEDO_FROM_VERTEX_COLOR, true);
@@ -2374,13 +2352,13 @@ Ref<Material> BaseMaterial3D::get_material_for_2d(bool p_shaded, bool p_transpar
 		material->set_billboard_mode(p_billboard_y ? BILLBOARD_FIXED_Y : BILLBOARD_ENABLED);
 	}
 
-	materials_for_2d[hash] = material;
+	materials_for_2d[key] = material;
 
 	if (r_shader_rid) {
-		*r_shader_rid = materials_for_2d[hash]->get_shader_rid();
+		*r_shader_rid = materials_for_2d[key]->get_shader_rid();
 	}
 
-	return materials_for_2d[hash];
+	return materials_for_2d[key];
 }
 
 void BaseMaterial3D::set_on_top_of_alpha() {

scene/resources/material.h

@@ -760,7 +760,7 @@ public:
 	static void finish_shaders();
 	static void flush_changes();
 
-	static Ref<Material> get_material_for_2d(bool p_shaded, bool p_transparent, bool p_double_sided, bool p_cut_alpha, bool p_opaque_prepass, bool p_billboard = false, bool p_billboard_y = false, bool p_msdf = false, bool p_no_depth = false, bool p_fixed_size = false, TextureFilter p_filter = TEXTURE_FILTER_LINEAR_WITH_MIPMAPS, RID *r_shader_rid = nullptr);
+	static Ref<Material> get_material_for_2d(bool p_shaded, Transparency p_transparency, bool p_double_sided, bool p_billboard = false, bool p_billboard_y = false, bool p_msdf = false, bool p_no_depth = false, bool p_fixed_size = false, TextureFilter p_filter = TEXTURE_FILTER_LINEAR_WITH_MIPMAPS, RID *r_shader_rid = nullptr);
 
 	virtual RID get_shader_rid() const override;