Since tracing is an iffy subject, and we all know that tracing someone else's art and claiming it as your own is bad, and tracing your own art is fine but not recommended when it comes to learning art such as drawing anatomy and perspective, I have certain questions when it comes to tracing:
1. What's the fine line of direct tracing from photographs?
2. How helpful is tracing from the photos you have taken?
3. Is tracing from public domain art okay?
Updated