diff --git a/core/variant/variant_parser.cpp b/core/variant/variant_parser.cpp
index 6fa6a582f2..8133dc50b4 100644
--- a/core/variant/variant_parser.cpp
+++ b/core/variant/variant_parser.cpp
@@ -1934,7 +1934,7 @@ Error VariantParser::parse(Stream *p_stream, Variant &r_ret, String &r_err_str,
 //////////////////////////////////////////////////////////////////////////////////
 //////////////////////////////////////////////////////////////////////////////////
 
-static String rtos_fix(double p_value) {
+static String rtos_fix(double p_value, bool p_compat) {
 	if (p_value == 0.0) {
 		return "0"; //avoid negative zero (-0) being written, which may annoy git, svn, etc. for changes when they don't exist.
 	} else if (isnan(p_value)) {
@@ -1942,6 +1942,8 @@ static String rtos_fix(double p_value) {
 	} else if (isinf(p_value)) {
 		if (p_value > 0) {
 			return "inf";
+		} else if (p_compat) {
+			return "inf_neg";
 		} else {
 			return "-inf";
 		}
@@ -1962,7 +1964,7 @@ Error VariantWriter::write(const Variant &p_variant, StoreStringFunc p_store_str
 			p_store_string_func(p_store_string_ud, itos(p_variant.operator int64_t()));
 		} break;
 		case Variant::FLOAT: {
-			String s = rtos_fix(p_variant.operator double());
+			String s = rtos_fix(p_variant.operator double(), p_compat);
 			if (s != "inf" && s != "-inf" && s != "nan") {
 				if (!s.contains_char('.') && !s.contains_char('e') && !s.contains_char('E')) {
 					s += ".0";
@@ -1979,7 +1981,7 @@ Error VariantWriter::write(const Variant &p_variant, StoreStringFunc p_store_str
 		// Math types.
 		case Variant::VECTOR2: {
 			Vector2 v = p_variant;
-			p_store_string_func(p_store_string_ud, "Vector2(" + rtos_fix(v.x) + ", " + rtos_fix(v.y) + ")");
+			p_store_string_func(p_store_string_ud, "Vector2(" + rtos_fix(v.x, p_compat) + ", " + rtos_fix(v.y, p_compat) + ")");
 		} break;
 		case Variant::VECTOR2I: {
 			Vector2i v = p_variant;
@@ -1987,7 +1989,7 @@ Error VariantWriter::write(const Variant &p_variant, StoreStringFunc p_store_str
 		} break;
 		case Variant::RECT2: {
 			Rect2 aabb = p_variant;
-			p_store_string_func(p_store_string_ud, "Rect2(" + rtos_fix(aabb.position.x) + ", " + rtos_fix(aabb.position.y) + ", " + rtos_fix(aabb.size.x) + ", " + rtos_fix(aabb.size.y) + ")");
+			p_store_string_func(p_store_string_ud, "Rect2(" + rtos_fix(aabb.position.x, p_compat) + ", " + rtos_fix(aabb.position.y, p_compat) + ", " + rtos_fix(aabb.size.x, p_compat) + ", " + rtos_fix(aabb.size.y, p_compat) + ")");
 		} break;
 		case Variant::RECT2I: {
 			Rect2i aabb = p_variant;
@@ -1995,7 +1997,7 @@ Error VariantWriter::write(const Variant &p_variant, StoreStringFunc p_store_str
 		} break;
 		case Variant::VECTOR3: {
 			Vector3 v = p_variant;
-			p_store_string_func(p_store_string_ud, "Vector3(" + rtos_fix(v.x) + ", " + rtos_fix(v.y) + ", " + rtos_fix(v.z) + ")");
+			p_store_string_func(p_store_string_ud, "Vector3(" + rtos_fix(v.x, p_compat) + ", " + rtos_fix(v.y, p_compat) + ", " + rtos_fix(v.z, p_compat) + ")");
 		} break;
 		case Variant::VECTOR3I: {
 			Vector3i v = p_variant;
@@ -2003,7 +2005,7 @@ Error VariantWriter::write(const Variant &p_variant, StoreStringFunc p_store_str
 		} break;
 		case Variant::VECTOR4: {
 			Vector4 v = p_variant;
-			p_store_string_func(p_store_string_ud, "Vector4(" + rtos_fix(v.x) + ", " + rtos_fix(v.y) + ", " + rtos_fix(v.z) + ", " + rtos_fix(v.w) + ")");
+			p_store_string_func(p_store_string_ud, "Vector4(" + rtos_fix(v.x, p_compat) + ", " + rtos_fix(v.y, p_compat) + ", " + rtos_fix(v.z, p_compat) + ", " + rtos_fix(v.w, p_compat) + ")");
 		} break;
 		case Variant::VECTOR4I: {
 			Vector4i v = p_variant;
@@ -2011,15 +2013,15 @@ Error VariantWriter::write(const Variant &p_variant, StoreStringFunc p_store_str
 		} break;
 		case Variant::PLANE: {
 			Plane p = p_variant;
-			p_store_string_func(p_store_string_ud, "Plane(" + rtos_fix(p.normal.x) + ", " + rtos_fix(p.normal.y) + ", " + rtos_fix(p.normal.z) + ", " + rtos_fix(p.d) + ")");
+			p_store_string_func(p_store_string_ud, "Plane(" + rtos_fix(p.normal.x, p_compat) + ", " + rtos_fix(p.normal.y, p_compat) + ", " + rtos_fix(p.normal.z, p_compat) + ", " + rtos_fix(p.d, p_compat) + ")");
 		} break;
 		case Variant::AABB: {
 			AABB aabb = p_variant;
-			p_store_string_func(p_store_string_ud, "AABB(" + rtos_fix(aabb.position.x) + ", " + rtos_fix(aabb.position.y) + ", " + rtos_fix(aabb.position.z) + ", " + rtos_fix(aabb.size.x) + ", " + rtos_fix(aabb.size.y) + ", " + rtos_fix(aabb.size.z) + ")");
+			p_store_string_func(p_store_string_ud, "AABB(" + rtos_fix(aabb.position.x, p_compat) + ", " + rtos_fix(aabb.position.y, p_compat) + ", " + rtos_fix(aabb.position.z, p_compat) + ", " + rtos_fix(aabb.size.x, p_compat) + ", " + rtos_fix(aabb.size.y, p_compat) + ", " + rtos_fix(aabb.size.z, p_compat) + ")");
 		} break;
 		case Variant::QUATERNION: {
 			Quaternion quaternion = p_variant;
-			p_store_string_func(p_store_string_ud, "Quaternion(" + rtos_fix(quaternion.x) + ", " + rtos_fix(quaternion.y) + ", " + rtos_fix(quaternion.z) + ", " + rtos_fix(quaternion.w) + ")");
+			p_store_string_func(p_store_string_ud, "Quaternion(" + rtos_fix(quaternion.x, p_compat) + ", " + rtos_fix(quaternion.y, p_compat) + ", " + rtos_fix(quaternion.z, p_compat) + ", " + rtos_fix(quaternion.w, p_compat) + ")");
 		} break;
 		case Variant::TRANSFORM2D: {
 			String s = "Transform2D(";
@@ -2029,7 +2031,7 @@ Error VariantWriter::write(const Variant &p_variant, StoreStringFunc p_store_str
 					if (i != 0 || j != 0) {
 						s += ", ";
 					}
-					s += rtos_fix(m3.columns[i][j]);
+					s += rtos_fix(m3.columns[i][j], p_compat);
 				}
 			}
 
@@ -2043,7 +2045,7 @@ Error VariantWriter::write(const Variant &p_variant, StoreStringFunc p_store_str
 					if (i != 0 || j != 0) {
 						s += ", ";
 					}
-					s += rtos_fix(m3.rows[i][j]);
+					s += rtos_fix(m3.rows[i][j], p_compat);
 				}
 			}
 
@@ -2058,11 +2060,11 @@ Error VariantWriter::write(const Variant &p_variant, StoreStringFunc p_store_str
 					if (i != 0 || j != 0) {
 						s += ", ";
 					}
-					s += rtos_fix(m3.rows[i][j]);
+					s += rtos_fix(m3.rows[i][j], p_compat);
 				}
 			}
 
-			s = s + ", " + rtos_fix(t.origin.x) + ", " + rtos_fix(t.origin.y) + ", " + rtos_fix(t.origin.z);
+			s = s + ", " + rtos_fix(t.origin.x, p_compat) + ", " + rtos_fix(t.origin.y, p_compat) + ", " + rtos_fix(t.origin.z, p_compat);
 
 			p_store_string_func(p_store_string_ud, s + ")");
 		} break;
@@ -2074,7 +2076,7 @@ Error VariantWriter::write(const Variant &p_variant, StoreStringFunc p_store_str
 					if (i != 0 || j != 0) {
 						s += ", ";
 					}
-					s += rtos_fix(t.columns[i][j]);
+					s += rtos_fix(t.columns[i][j], p_compat);
 				}
 			}
 
@@ -2084,7 +2086,7 @@ Error VariantWriter::write(const Variant &p_variant, StoreStringFunc p_store_str
 		// Misc types.
 		case Variant::COLOR: {
 			Color c = p_variant;
-			p_store_string_func(p_store_string_ud, "Color(" + rtos_fix(c.r) + ", " + rtos_fix(c.g) + ", " + rtos_fix(c.b) + ", " + rtos_fix(c.a) + ")");
+			p_store_string_func(p_store_string_ud, "Color(" + rtos_fix(c.r, p_compat) + ", " + rtos_fix(c.g, p_compat) + ", " + rtos_fix(c.b, p_compat) + ", " + rtos_fix(c.a, p_compat) + ")");
 		} break;
 		case Variant::STRING_NAME: {
 			String str = p_variant;
@@ -2399,7 +2401,7 @@ Error VariantWriter::write(const Variant &p_variant, StoreStringFunc p_store_str
 				if (i > 0) {
 					p_store_string_func(p_store_string_ud, ", ");
 				}
-				p_store_string_func(p_store_string_ud, rtos_fix(ptr[i]));
+				p_store_string_func(p_store_string_ud, rtos_fix(ptr[i], p_compat));
 			}
 
 			p_store_string_func(p_store_string_ud, ")");
@@ -2414,7 +2416,7 @@ Error VariantWriter::write(const Variant &p_variant, StoreStringFunc p_store_str
 				if (i > 0) {
 					p_store_string_func(p_store_string_ud, ", ");
 				}
-				p_store_string_func(p_store_string_ud, rtos_fix(ptr[i]));
+				p_store_string_func(p_store_string_ud, rtos_fix(ptr[i], p_compat));
 			}
 
 			p_store_string_func(p_store_string_ud, ")");
@@ -2444,7 +2446,7 @@ Error VariantWriter::write(const Variant &p_variant, StoreStringFunc p_store_str
 				if (i > 0) {
 					p_store_string_func(p_store_string_ud, ", ");
 				}
-				p_store_string_func(p_store_string_ud, rtos_fix(ptr[i].x) + ", " + rtos_fix(ptr[i].y));
+				p_store_string_func(p_store_string_ud, rtos_fix(ptr[i].x, p_compat) + ", " + rtos_fix(ptr[i].y, p_compat));
 			}
 
 			p_store_string_func(p_store_string_ud, ")");
@@ -2459,7 +2461,7 @@ Error VariantWriter::write(const Variant &p_variant, StoreStringFunc p_store_str
 				if (i > 0) {
 					p_store_string_func(p_store_string_ud, ", ");
 				}
-				p_store_string_func(p_store_string_ud, rtos_fix(ptr[i].x) + ", " + rtos_fix(ptr[i].y) + ", " + rtos_fix(ptr[i].z));
+				p_store_string_func(p_store_string_ud, rtos_fix(ptr[i].x, p_compat) + ", " + rtos_fix(ptr[i].y, p_compat) + ", " + rtos_fix(ptr[i].z, p_compat));
 			}
 
 			p_store_string_func(p_store_string_ud, ")");
@@ -2474,7 +2476,7 @@ Error VariantWriter::write(const Variant &p_variant, StoreStringFunc p_store_str
 				if (i > 0) {
 					p_store_string_func(p_store_string_ud, ", ");
 				}
-				p_store_string_func(p_store_string_ud, rtos_fix(ptr[i].r) + ", " + rtos_fix(ptr[i].g) + ", " + rtos_fix(ptr[i].b) + ", " + rtos_fix(ptr[i].a));
+				p_store_string_func(p_store_string_ud, rtos_fix(ptr[i].r, p_compat) + ", " + rtos_fix(ptr[i].g, p_compat) + ", " + rtos_fix(ptr[i].b, p_compat) + ", " + rtos_fix(ptr[i].a, p_compat));
 			}
 
 			p_store_string_func(p_store_string_ud, ")");
@@ -2489,7 +2491,7 @@ Error VariantWriter::write(const Variant &p_variant, StoreStringFunc p_store_str
 				if (i > 0) {
 					p_store_string_func(p_store_string_ud, ", ");
 				}
-				p_store_string_func(p_store_string_ud, rtos_fix(ptr[i].x) + ", " + rtos_fix(ptr[i].y) + ", " + rtos_fix(ptr[i].z) + ", " + rtos_fix(ptr[i].w));
+				p_store_string_func(p_store_string_ud, rtos_fix(ptr[i].x, p_compat) + ", " + rtos_fix(ptr[i].y, p_compat) + ", " + rtos_fix(ptr[i].z, p_compat) + ", " + rtos_fix(ptr[i].w, p_compat));
 			}
 
 			p_store_string_func(p_store_string_ud, ")");