https://www.rockraidersunited.com/topic/8460-another-lego-digital-designer-g-to-obj-converter/
Quick little thing thrown together over a few days, initially modified from a .g importing script for Unity made by https://github.com/SimonNitzsche
If you use this on bricks from LDD, be aware you should be using the contents of db.lif in AppData, NOT Assets.lif in Program Files: https://www.rockraidersunited.com/topic/7899-ldd-updatingpatching/
To extract LIF files, I recommend: https://github.com/JrMasterModelBuilder/LIF-Extractor/releases