Like many, I'm glad to have the more-stable and capable Build 361 of Vegas Pro 15. I have an AMD R9 390 GPU, which I'm experimenting with for rendering in VP15b361. This thread is for questions about AMD VCE rendering (and hopefully answers).
Here's one question: Can AMD VCE be used with Magix AVC at 4K resolution? If so, what settings are required? I've tried it, and it fails instantly, although the same render with Mainconcept works (slowly). I've also tried at 1080 resolution, and both AMD VCE and Mainconcept work at that resolution.