Fix reimporting textures after changing import project settings

Fixes godotengine#94882.

editor/editor_file_system.cpp

@@ -438,7 +438,7 @@ bool EditorFileSystem::_test_for_reimport(const String &p_path, bool p_only_impo
 	Error err;
 	Ref<FileAccess> f = FileAccess::open(p_path + ".import", FileAccess::READ, &err);
 
-	if (f.is_null()) { //no import file, do reimport
+	if (f.is_null()) { // No import file, reimport.
 		return true;
 	}
 
@@ -472,10 +472,15 @@ bool EditorFileSystem::_test_for_reimport(const String &p_path, bool p_only_impo
 			break;
 		} else if (err != OK) {
 			ERR_PRINT("ResourceFormatImporter::load - '" + p_path + ".import:" + itos(lines) + "' error '" + error_text + "'.");
-			return false; //parse error, try reimport manually (Avoid reimport loop on broken file)
+			// Parse error, skip and let user attempt manual reimport to avoid reimport loop.
+			return false;
 		}
 
 		if (!assign.is_empty()) {
+			if (assign == "valid" && value.operator bool() == false) {
+				// Invalid import (failed previous import), skip and let user attempt manual reimport to avoid reimport loop.
+				return false;
+			}
 			if (assign.begins_with("path")) {
 				to_check.push_back(value);
 			} else if (assign == "files") {
@@ -502,6 +507,11 @@ bool EditorFileSystem::_test_for_reimport(const String &p_path, bool p_only_impo
 		}
 	}
 
+	if (!ResourceFormatImporter::get_singleton()->are_import_settings_valid(p_path)) {
+		// Reimport settings are out of sync with project settings, reimport.
+		return true;
+	}
+
 	if (importer_name == "keep" || importer_name == "skip") {
 		return false; //keep mode, do not reimport
 	}