README: mention that Carmack's Reverse is back

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@ -137,14 +137,14 @@ Then point CMake at your toolchain file:
## Back End Rendering of Stencil Shadows
The Doom 3 GPL source code release does not include functionality enabling rendering
The Doom 3 GPL source code release **did** not include functionality enabling rendering
of stencil shadows via the "depth fail" method, a functionality commonly known as
"Carmack's Reverse".
"Carmack's Reverse".
It has been restored in dhewm3 1.5.1 after Creative Labs' [patent](https://patents.google.com/patent/US6384822B1/en)
finally expired.
***Note*** that this **does *not* change the visual appereance** of the game.
The shadows look the same, they're just created in a slightly different way.
In theory there might be a small performance impact, but on hardware less than
ten years old it shouldn't make a difference.
Note that this did not change the visual appereance of the game, and didn't seem to
make a noticeable performance difference (on halfway-recent hardware) either.
## MayaImport