- Also removed the previous FastBuild shader compiler integration based on an older API.
- Made Distributed Build controller selection OS-agnostic.
#review-16452691 @Ben.Ingram, @Jason.Nadro, @Will.Damon, @Brandon.Schaefer, @James.Singer, @Rolando.Caloca
[CL 16476321 by savagecodes in ue5-main branch]