diff --git a/src/p_saveg.c b/src/p_saveg.c
index c9b474b1d..2d39ccfa2 100644
--- a/src/p_saveg.c
+++ b/src/p_saveg.c
@@ -481,7 +481,7 @@ static void SaveExtraColormap(UINT8 *put, extracolormap_t *exc)
 
 	WRITEUINT8(put, exc->fadestart);
 	WRITEUINT8(put, exc->fadeend);
-	WRITEUINT8(put, (UINT8)exc->fog);
+	WRITEUINT8(put, exc->fog);
 
 	WRITEINT32(put, exc->rgba);
 	WRITEINT32(put, exc->fadergba);
@@ -497,9 +497,8 @@ static extracolormap_t *LoadExtraColormap(UINT8 *get)
 	//size_t dbg_i = 0;
 
 	UINT8 fadestart = READUINT8(get),
-		fadeend = READUINT8(get);
-
-	boolean fog = (boolean)READUINT8(get);
+		fadeend = READUINT8(get),
+		fog = READUINT8(get);
 
 	INT32 rgba = READINT32(get),
 		fadergba = READINT32(get);
diff --git a/src/r_data.c b/src/r_data.c
index c2e28fe9f..e987da066 100644
--- a/src/r_data.c
+++ b/src/r_data.c
@@ -1439,10 +1439,10 @@ void R_AddColormapToList(extracolormap_t *extra_colormap)
 //
 #ifdef EXTRACOLORMAPLUMPS
 boolean R_CheckDefaultColormapByValues(boolean checkrgba, boolean checkfadergba, boolean checkparams,
-	INT32 rgba, INT32 fadergba, UINT8 fadestart, UINT8 fadeend, boolean fog, lumpnum_t lump)
+	INT32 rgba, INT32 fadergba, UINT8 fadestart, UINT8 fadeend, UINT8 fog, lumpnum_t lump)
 #else
 boolean R_CheckDefaultColormapByValues(boolean checkrgba, boolean checkfadergba, boolean checkparams,
-	INT32 rgba, INT32 fadergba, UINT8 fadestart, UINT8 fadeend, boolean fog)
+	INT32 rgba, INT32 fadergba, UINT8 fadestart, UINT8 fadeend, UINT8 fog)
 #endif
 {
 	return (
@@ -1504,9 +1504,9 @@ boolean R_CheckEqualColormaps(extracolormap_t *exc_a, extracolormap_t *exc_b, bo
 // NOTE: Returns NULL if no match is found
 //
 #ifdef EXTRACOLORMAPLUMPS
-extracolormap_t *R_GetColormapFromListByValues(INT32 rgba, INT32 fadergba, UINT8 fadestart, UINT8 fadeend, boolean fog, lumpnum_t lump)
+extracolormap_t *R_GetColormapFromListByValues(INT32 rgba, INT32 fadergba, UINT8 fadestart, UINT8 fadeend, UINT8 fog, lumpnum_t lump)
 #else
-extracolormap_t *R_GetColormapFromListByValues(INT32 rgba, INT32 fadergba, UINT8 fadestart, UINT8 fadeend, boolean fog)
+extracolormap_t *R_GetColormapFromListByValues(INT32 rgba, INT32 fadergba, UINT8 fadestart, UINT8 fadeend, UINT8 fog)
 #endif
 {
 	extracolormap_t *exc;
@@ -1730,7 +1730,7 @@ extracolormap_t *R_CreateColormap(char *p1, char *p2, char *p3)
 	// default values
 	UINT8 cr = 0, cg = 0, cb = 0, ca = 0, cfr = 0, cfg = 0, cfb = 0, cfa = 25;
 	UINT32 fadestart = 0, fadeend = 31;
-	boolean fog = false;
+	UINT8 fog = 0;
 	INT32 rgba = 0, fadergba = 0x19000000;
 
 #define HEX2INT(x) (UINT32)(x >= '0' && x <= '9' ? x - '0' : x >= 'a' && x <= 'f' ? x - 'a' + 10 : x >= 'A' && x <= 'F' ? x - 'A' + 10 : 0)
diff --git a/src/r_data.h b/src/r_data.h
index 3a7740c96..54857661a 100644
--- a/src/r_data.h
+++ b/src/r_data.h
@@ -112,12 +112,12 @@ void R_AddColormapToList(extracolormap_t *extra_colormap);
 
 #ifdef EXTRACOLORMAPLUMPS
 boolean R_CheckDefaultColormapByValues(boolean checkrgba, boolean checkfadergba, boolean checkparams,
-	INT32 rgba, INT32 fadergba, UINT8 fadestart, UINT8 fadeend, boolean fog, lumpnum_t lump);
-extracolormap_t *R_GetColormapFromListByValues(INT32 rgba, INT32 fadergba, UINT8 fadestart, UINT8 fadeend, boolean fog, lumpnum_t lump);
+	INT32 rgba, INT32 fadergba, UINT8 fadestart, UINT8 fadeend, UINT8 fog, lumpnum_t lump);
+extracolormap_t *R_GetColormapFromListByValues(INT32 rgba, INT32 fadergba, UINT8 fadestart, UINT8 fadeend, UINT8 fog, lumpnum_t lump);
 #else
 boolean R_CheckDefaultColormapByValues(boolean checkrgba, boolean checkfadergba, boolean checkparams,
-	INT32 rgba, INT32 fadergba, UINT8 fadestart, UINT8 fadeend, boolean fog);
-extracolormap_t *R_GetColormapFromListByValues(INT32 rgba, INT32 fadergba, UINT8 fadestart, UINT8 fadeend, boolean fog);
+	INT32 rgba, INT32 fadergba, UINT8 fadestart, UINT8 fadeend, UINT8 fog);
+extracolormap_t *R_GetColormapFromListByValues(INT32 rgba, INT32 fadergba, UINT8 fadestart, UINT8 fadeend, UINT8 fog);
 #endif
 boolean R_CheckDefaultColormap(extracolormap_t *extra_colormap, boolean checkrgba, boolean checkfadergba, boolean checkparams);
 boolean R_CheckEqualColormaps(extracolormap_t *exc_a, extracolormap_t *exc_b, boolean checkrgba, boolean checkfadergba, boolean checkparams);
diff --git a/src/r_defs.h b/src/r_defs.h
index 1f2afdb99..b9c6fd7dc 100644
--- a/src/r_defs.h
+++ b/src/r_defs.h
@@ -53,7 +53,7 @@ typedef UINT8 lighttable_t;
 typedef struct extracolormap_s
 {
 	UINT8 fadestart, fadeend;
-	boolean fog;
+	UINT8 fog; // 1 = disable sprite fullbright, 2 = force planes fullbright, see public gitlab !268
 
 	// store rgba values in combined bitwise
 	// also used in OpenGL instead lighttables