Review some comments

src/rlgl.h

@@ -602,10 +602,10 @@ RLAPI Matrix GetMatrixModelview(void);                                    // Get
 
 // Texture maps generation (PBR)
 // NOTE: Required shaders should be provided
-RLAPI TextureCubemap GenTextureCubemap(Shader shader, Texture2D panorama, int size, int format); // Generate cubemap texture from 2D panorama texture
+RLAPI TextureCubemap GenTextureCubemap(Shader shader, Texture2D panorama, int size, int format); // Generate cubemap (6 faces) from equirectangular (panorama) texture
-RLAPI TextureCubemap GenTextureIrradiance(Shader shader, TextureCubemap cubemap, int size);      // Generate irradiance texture using cubemap data
+RLAPI TextureCubemap GenTextureIrradiance(Shader shader, TextureCubemap cubemap, int size);      // Generate irradiance cubemap using cubemap texture
-RLAPI TextureCubemap GenTexturePrefilter(Shader shader, TextureCubemap cubemap, int size);       // Generate prefilter texture using cubemap data
+RLAPI TextureCubemap GenTexturePrefilter(Shader shader, TextureCubemap cubemap, int size);       // Generate prefilter cubemap using cubemap texture
-RLAPI Texture2D GenTextureBRDF(Shader shader, int size);                  // Generate BRDF texture using cubemap data
+RLAPI Texture2D GenTextureBRDF(Shader shader, int size);                  // Generate a generic BRDF texture
 
 // Shading begin/end functions
 RLAPI void BeginShaderMode(Shader shader);              // Begin custom shader drawing
@@ -883,7 +883,7 @@ typedef struct rlglData {
         int framebufferWidth;               // Default framebuffer width
         int framebufferHeight;              // Default framebuffer height
 
-    } State;
+    } State;            // Renderer state
     struct {
         bool vao;                           // VAO support (OpenGL ES2 could not support VAO extension)
         bool texNPOT;                       // NPOT textures full support
@@ -909,7 +909,7 @@ typedef struct rlglData {
         unsigned int stereoTexId;           // VR stereo color texture (attached to framebuffer)
         bool simulatorReady;                // VR simulator ready flag
         bool stereoRender;                  // VR stereo rendering enabled/disabled flag
-    } Vr;
+    } Vr;               // VR simulator data
 #endif  // SUPPORT_VR_SIMULATOR
 } rlglData;
 #endif  // GRAPHICS_API_OPENGL_33 || GRAPHICS_API_OPENGL_ES2