Revert partial "FBX add roughness mappings and fixes general some mat…

…erial bugs"

This reverts partial commit b624e13.

This resolves a bug with pivots and skinning breaking with this change.

modules/fbx/fbx_parser/FBXProperties.cpp

@@ -168,19 +168,11 @@ PropertyTable::PropertyTable(const ElementPtr element, const PropertyTable *temp
 		}
 
 		LazyPropertyMap::const_iterator it = lazyProps.find(name);
-
 		if (it != lazyProps.end()) {
 			DOMWarning("duplicate property name, will hide previous value: " + name, v.second);
 			continue;
 		}
 
-		if (it->second == nullptr) {
-			print_error("skipped invalid element insertion for " + String(name.c_str()));
-			continue;
-		}
-
-		//print_verbose("storing lazy property: " + String(name.c_str()));
-
 		// since the above checks for duplicates we can be sure to insert the only match here.
 		lazyProps[name] = v.second;
 	}
@@ -195,26 +187,28 @@ PropertyTable::~PropertyTable() {
 
 // ------------------------------------------------------------------------------------------------
 PropertyPtr PropertyTable::Get(const std::string &name) const {
+	PropertyMap::const_iterator it = props.find(name);
+	if (it == props.end()) {
+		// hasn't been parsed yet?
+		LazyPropertyMap::const_iterator lit = lazyProps.find(name);
+		if (lit != lazyProps.end()) {
+			props[name] = ReadTypedProperty(lit->second);
+			it = props.find(name);
+
+			//ai_assert(it != props.end());
+		}
 
-	// check if loaded already - return it.
-	PropertyMap::const_iterator loaded_property_element = props.find(name);
-	if (loaded_property_element != props.end()) {
-		//print_verbose("Returning conversion for lazy property: " + String(loaded_property_element->first.c_str()));
-		return loaded_property_element->second;
-	}
-
-	// now load it since we don't have a match
-	LazyPropertyMap::const_iterator unloadedProperty = lazyProps.find(name);
-	if (unloadedProperty != lazyProps.end()) {
-		PropertyPtr loaded_property = ReadTypedProperty(unloadedProperty->second);
-		ERR_FAIL_COND_V_MSG(!loaded_property, nullptr, "[fbx][serious] unable to load typed property");
+		if (it == props.end()) {
+			// check property template
+			if (templateProps) {
+				return templateProps->Get(name);
+			}
 
-		//print_verbose("loaded property successfully: " + String(name.c_str()));
-		props.insert(std::make_pair(name, loaded_property));
-		return loaded_property;
+			return nullptr;
+		}
 	}
 
-	return nullptr;
+	return (*it).second;
 }
 
 DirectPropertyMap PropertyTable::GetUnparsedProperties() const {