Everyone using Open CASCADE Technology is welcome to contribute to it. However, you should keep in mind that sending modifications does not automatically lead to their fast appearance in OCCT. Moreover, we do not even commit ourselves to integrating them. Every contribution needs to be first assessed by our experts for its relevance, compliance with other code, coding rules, etc. Additionally, they require non-regression testing and extending of our test base to ensure future non-regression. So, bug integration is connected with our investments, resource allocation and this can only be done according to our available resources not booked for customer projects.