--- ray/src/common/otypes.h	1992/01/04 19:51:21	2.2
+++ ray/src/common/otypes.h	1995/12/08 18:16:13	2.6
@@ -44,24 +44,25 @@ typedef struct {
 #define  MAT_LIGHT	27		/* primary light source */
 #define  MAT_ILLUM	28		/* secondary light source */
 #define  MAT_SPOT	29		/* spot light source */
-#define  MAT_MIRROR	30		/* mirror (secondary source) */
-#define  MAT_TFUNC	31		/* trans brdf function */
-#define  MAT_BRTDF	32		/* brtd function */
-#define  MAT_PDATA	33		/* plastic brdf data */
-#define  MAT_MDATA	34		/* metal brdf data */
-#define  MAT_TDATA	35		/* trans brdf data */
-#define  PAT_CFUNC	36		/* color function */
-#define  MAT_CLIP	37		/* clipping surface */
-#define  PAT_CDATA	38		/* color data */
-#define  PAT_CTEXT	39		/* colored text */
-#define  TEX_DATA	40		/* surface texture data */
-#define  MIX_FUNC	41		/* mixing function */
-#define  MIX_DATA	42		/* mixing data */
-#define  MIX_TEXT	43		/* mixing text */
-#define  MAT_DIRECT1	44		/* unidirecting material */
-#define  MAT_DIRECT2	45		/* bidirecting material */
+#define  MAT_MIST	30		/* mist medium */
+#define  MAT_MIRROR	31		/* mirror (secondary source) */
+#define  MAT_TFUNC	32		/* trans brdf function */
+#define  MAT_BRTDF	33		/* brtd function */
+#define  MAT_PDATA	34		/* plastic brdf data */
+#define  MAT_MDATA	35		/* metal brdf data */
+#define  MAT_TDATA	36		/* trans brdf data */
+#define  PAT_CFUNC	37		/* color function */
+#define  MAT_CLIP	38		/* clipping surface */
+#define  PAT_CDATA	39		/* color data */
+#define  PAT_CTEXT	40		/* colored text */
+#define  TEX_DATA	41		/* surface texture data */
+#define  MIX_FUNC	42		/* mixing function */
+#define  MIX_DATA	43		/* mixing data */
+#define  MIX_TEXT	44		/* mixing text */
+#define  MAT_DIRECT1	45		/* unidirecting material */
+#define  MAT_DIRECT2	46		/* bidirecting material */
 				/* number of object types */
-#define  NUMOTYPE	46
+#define  NUMOTYPE	47
 				/* type flags */
 #define  T_S		01		/* surface (object) */
 #define  T_M		02		/* material */
@@ -84,14 +85,14 @@ extern FUN  ofun[];			/* our type list */
 
 #define  issurface(t)	(ofun[t].flags & T_S)
 #define  isvolume(t)	(ofun[t].flags & T_V)
-#define  ismodifier(t)	(!issurface(t))
+#define  ismodifier(t)	(!(ofun[t].flags & (T_S|T_V)))
 #define  ismaterial(t)	(ofun[t].flags & T_M)
-#define  istexture(t)	(ofun[t].flags & (T_P|T_T|T_X))
 #define  islight(t)	(ofun[t].flags & T_L)
 #define  isvlight(t)	(ofun[t].flags & T_LV)
 #define  hasdata(t)	(ofun[t].flags & (T_D|T_I))
 #define  hasfunc(t)	(ofun[t].flags & (T_F|T_D|T_I))
 #define  hastext(t)	(ofun[t].flags & T_E)
+#define  isflat(t)	((t)==OBJ_FACE || (t)==OBJ_RING)
 
 extern int  o_default();
 					/* type list initialization */
@@ -101,7 +102,7 @@ extern int  o_default();
 				{ "texfunc",	T_T|T_F,	o_default }, \
 				{ "ring",	T_S,		o_default }, \
 				{ "cylinder",	T_S,		o_default }, \
-				{ "instance",	T_S|T_V,	o_default }, \
+				{ "instance",	T_V,		o_default }, \
 				{ "cup",	T_S,		o_default }, \
 				{ "bubble",	T_S,		o_default }, \
 				{ "tube",	T_S,		o_default }, \
@@ -125,6 +126,7 @@ extern int  o_default();
 				{ "light",	T_M|T_L,	o_default }, \
 				{ "illum",	T_M|T_L,	o_default }, \
 				{ "spotlight",	T_M|T_L,	o_default }, \
+				{ "mist",	T_M,		o_default }, \
 				{ "mirror",	T_M|T_LV,	o_default }, \
 				{ "transfunc",	T_M|T_F,	o_default }, \
 				{ "BRTDfunc",	T_M|T_F,	o_default }, \