mention that embree is required

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Eric Wasylishen 2019-12-09 19:31:01 -07:00 committed by GitHub
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@ -42,14 +42,14 @@ source code.
## Compiling
Requires CMake 2.8, groff, and a compiler with C99 and C++11 support.
[Embree v2.10.0+](http://embree.github.io/) is optional but recommended.
If you do use Embree, the Thread Building Blocks (tbb) library is also required.
[Embree v2.10.0+](http://embree.github.io/) is required (sorry, no Embree 3.x support right now).
The Thread Building Blocks (tbb) library (Embree dependency) may be required.
Tested on:
- Ubuntu 14.04 / Clang 3.5.0
- Ubuntu 14.04 / gcc 4.8.4
- OS X 10.11 / Xcode 7.3
- Windows 10 / Visual Studio 2013 Community
- Windows 10 / Visual Studio 2013, 2019 Community
### Ubuntu 14.04 x86_64