Update SIMD section;

Author: bjornbytes

guides/Compiling.md

@@ -18,11 +18,11 @@ Other systems and hardware may work, but are not frequently tested.
 
 ### Physics SIMD
 
-When building for x86, the physics module requires a CPU with AVX/AVX2 support.  To work around
-this, disable the physics module by compiling with `-DLOVR_ENABLE_PHYSICS=OFF`, or compile with the
-`-DUSE_AVX=OFF` and `-DUSE_AVX2=OFF` flags to remove AVX instructions and use SSE4.2 instead.
-Similarly, to support CPUs without SSE4.2 or SSE4.1, use `-DUSE_SSE4_2=OFF` and/or
-`-DUSE_SSE4_1=OFF`.
+When building for x86, the physics module requires a CPU with AVX/AVX2 support.  To run LÖVR on
+older CPUs that don't support AVX, either disable the physics module by compiling with
+`-DLOVR_ENABLE_PHYSICS=OFF`, or compile with the `-DUSE_AVX=OFF` and `-DUSE_AVX2=OFF` flags to
+remove AVX instructions.  This will use SSE4.1/SSE4.2 instead, which can similarly be disabled with
+the `-DUSE_SSE4_2=OFF` and/or `-DUSE_SSE4_1=OFF` flags to run on even older CPUs.
 
 Dependencies
 ---