For the newer one, 90% is cookie-cutter pieces of animation code that are crudely stuck together - either open source or I bought the rights to use them. It is not 100% from scratch, that would take days! Remember we also have very different timezones - I have had a full day here as it is now 9pm. =)
The 3D pieces are done in Solidworks and refined in Blender. I spent a lot more time on the original, which has more 3D content.
What level chemistry are you studying? I am a PhD student in biomedical engineering.
I am in at the end of my second year, doing my exams for two more weeks. This means I am studying organic reactions 10h a day for the next 4 days 😅. I hope to be able to go into the more computational chemistry part in the future, however, have to take organic and inorganic lectures for 3 more semesters at least.
If you make it through that, you can make it through anything!