Thanks for the release of the source code. Can I use some of the code snippets in my project?
Hello RobertThomas and welcome to the Blackvoxel Forum
The answer is fixed by the GPL V3+ Free Software Licence.
To make it simple, it depends if your project is Free Software.
If you want to re-use some Blackvoxel code for a proprietary software, the answer is No. It's not permitted at all. It would be a licence infringement.
If you want to re-use Blackvoxel code in a free software with Free Software Licence, the answer is Yes. In this case, you'll have to fully comply with GPL V3+ licence (your licence must be compatible), and make citation of the source of the Blackvoxel project and it's copyright owners (authors and contributors).
Simple conclusion : Free Software projects are welcome, others are not.
In the hope we have answered to your questions.
The Blackvoxel Team