--- ray/src/common/bsdf_t.c	2015/04/06 18:28:35	3.40
+++ ray/src/common/bsdf_t.c	2018/01/05 21:00:24	3.45
@@ -1,5 +1,5 @@
 #ifndef lint
-static const char RCSid[] = "$Id: bsdf_t.c,v 3.40 2015/04/06 18:28:35 greg Exp $";
+static const char RCSid[] = "$Id: bsdf_t.c,v 3.45 2018/01/05 21:00:24 greg Exp $";
 #endif
 /*
  *  bsdf_t.c
@@ -569,12 +569,12 @@ SDqueryTre(const SDTre *sdt, float *coef,
 		return 0;		/* should be internal error */
 					/* get BSDF value */
 	yval = SDlookupTre(sdt->stc[tt_Y], gridPos, hc);
+	if (coef == NULL)		/* just getting hypercube? */
+		return 1;
 	if (sdt->stc[tt_u] == NULL || sdt->stc[tt_v] == NULL) {
-		if (coef != NULL) *coef = yval;
+		*coef = yval;
 		return 1;		/* no color */
 	}
-	if (coef == NULL)		/* just getting hypercube? */
-		return 1;
 					/* else decode color */
 	SDyuv2rgb(yval, SDlookupTre(sdt->stc[tt_u], gridPos, NULL),
 			SDlookupTre(sdt->stc[tt_v], gridPos, NULL), coef);
@@ -789,6 +789,7 @@ SDgetTreCDist(const FVECT inVec, SDComponent *sdc)
 	for (i = sdt->stc[tt_Y]->ndim - 2; i--; )
 		inCoord[i] = floor(inCoord[i]/quantum)*quantum + .5*quantum;
 	cdlast = NULL;			/* check for direction in cache list */
+	/* PLACE MUTEX LOCK HERE FOR THREAD-SAFE */
 	for (cd = (SDTreCDst *)sdc->cdList; cd != NULL;
 					cdlast = cd, cd = cd->next) {
 		if (cd->sidef != mode)
@@ -807,6 +808,7 @@ SDgetTreCDist(const FVECT inVec, SDComponent *sdc)
 		cd->next = (SDTreCDst *)sdc->cdList;
 		sdc->cdList = (SDCDst *)cd;
 	}
+	/* END MUTEX LOCK */
 	return (SDCDst *)cd;		/* ready to go */
 }
 
@@ -924,7 +926,7 @@ next_token(char **spp)
 }
 
 /* Advance pointer past matching token (or any token if c==0) */
-#define eat_token(spp,c)	(next_token(spp)==(c) ^ !(c) ? *(*(spp))++ : 0)
+#define eat_token(spp,c)	((next_token(spp)==(c)) ^ !(c) ? *(*(spp))++ : 0)
 
 /* Count words from this point in string to '}' */
 static int
@@ -1354,7 +1356,7 @@ extract_diffuse(SDValue *dv, SDSpectralDF *df)
 		memcpy(df->comp[0].cspec, tt_RGB_prim, sizeof(tt_RGB_prim));
 		dv->cieY = subtract_min_RGB(&dv->spec, sdt->stc);
 	} else {
-		df->comp[0].cspec[0] = c_dfcolor;
+		df->comp[0].cspec[0] = dv->spec = c_dfcolor;
 		dv->cieY = subtract_min_Y(sdt->stc[tt_Y]);
 	}
 	df->maxHemi -= dv->cieY;	/* adjust maximum hemispherical */
@@ -1419,7 +1421,7 @@ SDloadTre(SDData *sd, ezxml_t wtl)
 }
 
 /* Variable resolution BSDF methods */
-SDFunc SDhandleTre = {
+const SDFunc SDhandleTre = {
 	&SDgetTreBSDF,
 	&SDqueryTreProjSA,
 	&SDgetTreCDist,