diff --git a/src/powder.c b/src/powder.c
index 63351305b..6a4290d59 100644
--- a/src/powder.c
+++ b/src/powder.c
@@ -1089,7 +1089,7 @@ int nearest_part(int ci, int t)
 void update_particles_i(pixel *vid, int start, int inc)
 {
 	int i, j, x, y, t, nx, ny, r, surround_space, s, lt, rt, nt, nnx, nny, q, golnum, goldelete, z, neighbors, createdsomething;
-	float mv, dx, dy, ix, iy, lx, ly, nrx, nry, dp, ctemph, ctempl;
+	float mv, dx, dy, ix, iy, lx, ly, nrx, nry, dp, ctemph, ctempl, gravtot;
 	int fin_x, fin_y, clear_x, clear_y;
 	float fin_xf, fin_yf, clear_xf, clear_yf;
 	float nn, ct1, ct2, swappage;
@@ -1651,6 +1651,7 @@ void update_particles_i(pixel *vid, int start, int inc)
 
 
 			s = 1;
+			gravtot = fabsf(gravy[y/CELL][x/CELL])+fabsf(gravx[y/CELL][x/CELL]);
 			if (pv[y/CELL][x/CELL]>ptransitions[t].phv&&ptransitions[t].pht>-1) {
 				// particle type change due to high pressure
 				if (ptransitions[t].pht!=PT_NUM)
@@ -1668,10 +1669,17 @@ void update_particles_i(pixel *vid, int start, int inc)
 				if (ptransitions[t].plt!=PT_NUM)
 					t = ptransitions[t].plt;
 				else s = 0;
-			} else if ((fabsf(gravy[y/CELL][x/CELL])+fabsf(gravx[y/CELL][x/CELL]))>(ptransitions[t].phv/4.0f)&&ptransitions[t].pht>-1) {
+			} else if (gravtot>(ptransitions[t].phv/4.0f)&&ptransitions[t].pht>-1) {
 				// particle type change due to high gravity
 				if (ptransitions[t].pht!=PT_NUM)
 					t = ptransitions[t].pht;
+				else if (t==PT_BMTL) {
+					if (gravtot>0.625f)
+						t = PT_BRMT;
+					else if (gravtot>0.25f && parts[i].tmp==1)
+						t = PT_BRMT;
+					else s = 0;
+				}
 				else s = 0;
 			} else s = 0;
 			if (s) { // particle type change occurred