I've found this YouTube channel recently and thought I should share it with you guys, it seems that what they're trying to do is a software that not only has the same interface and features from the original Source Filmmaker, but it's also Open Source, can easily read any SFM file, has raytracing, better lighting and many other things, I will also leave their Github if anyone's interested in download it and their Patreon page in case anyone is interested to help such idea to come to light.