Update README.md

Author: paternostrox

README.md

@@ -17,4 +17,4 @@ An atlas voxel shader, it has a main texture and a normal map field.
 ### BillboardYFog.shader
 This is a billboard shader, it has a main texture field and rotates it in the Y axis so it always faces the camera, it also takes ambient fog into consideration.
 
-With this shader, 2D assets can appear to be 3D, just like Doom's characters.
+With this shader, 2D assets can appear to be 3D, just like Doom characters.