13 files changed, 109 insertions, 90 deletions

diff --git a/source/blender/blenkernel/BKE_lattice.h b/source/blender/blenkernel/BKE_lattice.h
index 9b29412675b..ba33da7729c 100644
--- a/source/blender/blenkernel/BKE_lattice.h
+++ b/source/blender/blenkernel/BKE_lattice.h
@@ -49,9 +49,14 @@ void BKE_lattice_free(struct Lattice *lt);
 void BKE_lattice_make_local(struct Lattice *lt);
 void calc_lat_fudu(int flag, int res, float *r_fu, float *r_du);
 
-void init_latt_deform(struct Object *oblatt, struct Object *ob);
-void calc_latt_deform(struct Object *, float co[3], float weight);
-void end_latt_deform(struct Object *);
+struct LatticeDeformData;
+struct LatticeDeformData *init_latt_deform(struct Object *oblatt, struct Object *ob)
+#ifdef __GNUC__
+__attribute__((warn_unused_result))
+#endif
+;
+void calc_latt_deform(struct LatticeDeformData *lattice_deform_data, float co[3], float weight);
+void end_latt_deform(struct LatticeDeformData *lattice_deform_data);
 
 int object_deform_mball(struct Object *ob, struct ListBase *dispbase);
 void outside_lattice(struct Lattice *lt);
diff --git a/source/blender/blenkernel/BKE_particle.h b/source/blender/blenkernel/BKE_particle.h
index 56b550a6f5d..d4965cf55fe 100644
--- a/source/blender/blenkernel/BKE_particle.h
+++ b/source/blender/blenkernel/BKE_particle.h
@@ -54,6 +54,7 @@ struct MCol;
 struct MFace;
 struct MVert;
 struct IpoCurve;
+struct LatticeDeformData;
 struct LinkNode;
 struct KDTree;
 struct RNG;
@@ -258,7 +259,7 @@ void psys_set_current_num(Object *ob, int index);
 /* UNUSED */
 // struct Object *psys_find_object(struct Scene *scene, struct ParticleSystem *psys);
 
-struct Object *psys_get_lattice(struct ParticleSimulationData *sim);
+struct LatticeDeformData *psys_create_lattice_deform_data(struct ParticleSimulationData *sim);
 
 int psys_in_edit_mode(struct Scene *scene, struct ParticleSystem *psys);
 int psys_check_enabled(struct Object *ob, struct ParticleSystem *psys);
diff --git a/source/blender/blenkernel/intern/anim.c b/source/blender/blenkernel/intern/anim.c
index b5a56024976..1b1bcffb493 100644
--- a/source/blender/blenkernel/intern/anim.c
+++ b/source/blender/blenkernel/intern/anim.c
@@ -1330,7 +1330,7 @@ static void new_particle_duplilist(ListBase *lb, ID *id, Scene *scene, Object *p
 
 		psys_check_group_weights(part);
 
-		psys->lattice = psys_get_lattice(&sim);
+		psys->lattice_deform_data = psys_create_lattice_deform_data(&sim);
 
 		/* gather list of objects or single object */
 		if (part->ren_as == PART_DRAW_GR) {
@@ -1567,9 +1567,9 @@ static void new_particle_duplilist(ListBase *lb, ID *id, Scene *scene, Object *p
 	if (obcopylist)
 		MEM_freeN(obcopylist);
 
-	if (psys->lattice) {
-		end_latt_deform(psys->lattice);
-		psys->lattice = NULL;
+	if (psys->lattice_deform_data) {
+		end_latt_deform(psys->lattice_deform_data);
+		psys->lattice_deform_data = NULL;
 	}
 }
 
diff --git a/source/blender/blenkernel/intern/lattice.c b/source/blender/blenkernel/intern/lattice.c
index b6baeea51b1..60b4db6aa9b 100644
--- a/source/blender/blenkernel/intern/lattice.c
+++ b/source/blender/blenkernel/intern/lattice.c
@@ -307,7 +307,13 @@ void BKE_lattice_make_local(Lattice *lt)
 	}
 }
 
-void init_latt_deform(Object *oblatt, Object *ob)
+typedef struct LatticeDeformData {
+	Object *object;
+	float *latticedata;
+	float latmat[4][4];
+} LatticeDeformData;
+
+LatticeDeformData *init_latt_deform(Object *oblatt, Object *ob)
 {
 	/* we make an array with all differences */
 	Lattice *lt = oblatt->data;
@@ -317,27 +323,30 @@ void init_latt_deform(Object *oblatt, Object *ob)
 	float *fp, imat[4][4];
 	float fu, fv, fw;
 	int u, v, w;
+	float *latticedata;
+	float latmat[4][4];
+	LatticeDeformData *lattice_deform_data;
 
 	if (lt->editlatt) lt = lt->editlatt->latt;
 	bp = lt->def;
 	
-	fp = lt->latticedata = MEM_mallocN(sizeof(float) * 3 * lt->pntsu * lt->pntsv * lt->pntsw, "latticedata");
+	fp = latticedata = MEM_mallocN(sizeof(float) * 3 * lt->pntsu * lt->pntsv * lt->pntsw, "latticedata");
 	
 	/* for example with a particle system: (ob == NULL) */
 	if (ob == NULL) {
 		/* in deformspace, calc matrix  */
-		invert_m4_m4(lt->latmat, oblatt->obmat);
+		invert_m4_m4(latmat, oblatt->obmat);
 	
 		/* back: put in deform array */
-		invert_m4_m4(imat, lt->latmat);
+		invert_m4_m4(imat, latmat);
 	}
 	else {
 		/* in deformspace, calc matrix */
 		invert_m4_m4(imat, oblatt->obmat);
-		mul_m4_m4m4(lt->latmat, imat, ob->obmat);
+		mul_m4_m4m4(latmat, imat, ob->obmat);
 	
 		/* back: put in deform array */
-		invert_m4_m4(imat, lt->latmat);
+		invert_m4_m4(imat, latmat);
 	}
 	
 	for (w = 0, fw = lt->fw; w < lt->pntsw; w++, fw += lt->dw) {
@@ -358,10 +367,18 @@ void init_latt_deform(Object *oblatt, Object *ob)
 			}
 		}
 	}
+
+	lattice_deform_data = MEM_mallocN(sizeof(LatticeDeformData), "Lattice Deform Data");
+	lattice_deform_data->latticedata = latticedata;
+	lattice_deform_data->object = oblatt;
+	copy_m4_m4(lattice_deform_data->latmat, latmat);
+
+	return lattice_deform_data;
 }
 
-void calc_latt_deform(Object *ob, float co[3], float weight)
+void calc_latt_deform(LatticeDeformData *lattice_deform_data, float co[3], float weight)
 {
+	Object *ob = lattice_deform_data->object;
 	Lattice *lt = ob->data;
 	float u, v, w, tu[4], tv[4], tw[4];
 	float vec[3];
@@ -375,7 +392,7 @@ void calc_latt_deform(Object *ob, float co[3], float weight)
 
 
 	if (lt->editlatt) lt = lt->editlatt->latt;
-	if (lt->latticedata == NULL) return;
+	if (lattice_deform_data->latticedata == NULL) return;
 
 	if (lt->vgroup[0] && dvert) {
 		defgrp_index = defgroup_name_index(ob, lt->vgroup);
@@ -383,7 +400,7 @@ void calc_latt_deform(Object *ob, float co[3], float weight)
 	}
 
 	/* co is in local coords, treat with latmat */
-	mul_v3_m4v3(vec, lt->latmat, co);
+	mul_v3_m4v3(vec, lattice_deform_data->latmat, co);
 
 	/* u v w coords */
 
@@ -456,7 +473,7 @@ void calc_latt_deform(Object *ob, float co[3], float weight)
 								idx_u = idx_v;
 							}
 
-							madd_v3_v3fl(co, &lt->latticedata[idx_u * 3], u);
+							madd_v3_v3fl(co, &lattice_deform_data->latticedata[idx_u * 3], u);
 
 							if (defgrp_index != -1)
 								weight_blend += (u * defvert_find_weight(dvert + idx_u, defgrp_index));
@@ -472,15 +489,12 @@ void calc_latt_deform(Object *ob, float co[3], float weight)
 
 }
 
-void end_latt_deform(Object *ob)
+void end_latt_deform(LatticeDeformData *lattice_deform_data)
 {
-	Lattice *lt = ob->data;
-	
-	if (lt->editlatt) lt = lt->editlatt->latt;
-	
-	if (lt->latticedata)
-		MEM_freeN(lt->latticedata);
-	lt->latticedata = NULL;
+	if (lattice_deform_data->latticedata)
+		MEM_freeN(lattice_deform_data->latticedata);
+
+	MEM_freeN(lattice_deform_data);
 }
 
 /* calculations is in local space of deformed object
@@ -815,13 +829,14 @@ void curve_deform_vector(Scene *scene, Object *cuOb, Object *target,
 void lattice_deform_verts(Object *laOb, Object *target, DerivedMesh *dm,
                           float (*vertexCos)[3], int numVerts, const char *vgroup, float fac)
 {
+	LatticeDeformData *lattice_deform_data;
 	int a;
 	int use_vgroups;
 
 	if (laOb->type != OB_LATTICE)
 		return;
 
-	init_latt_deform(laOb, target);
+	lattice_deform_data = init_latt_deform(laOb, target);
 
 	/* check whether to use vertex groups (only possible if target is a Mesh)
 	 * we want either a Mesh with no derived data, or derived data with
@@ -855,16 +870,16 @@ void lattice_deform_verts(Object *laOb, Object *target, DerivedMesh *dm,
 				weight = defvert_find_weight(dvert, defgrp_index);
 
 				if (weight > 0.0f)
-					calc_latt_deform(laOb, vertexCos[a], weight * fac);
+					calc_latt_deform(lattice_deform_data, vertexCos[a], weight * fac);
 			}
 		}
 	}
 	else {
 		for (a = 0; a < numVerts; a++) {
-			calc_latt_deform(laOb, vertexCos[a], fac);
+			calc_latt_deform(lattice_deform_data, vertexCos[a], fac);
 		}
 	}
-	end_latt_deform(laOb);
+	end_latt_deform(lattice_deform_data);
 }
 
 int object_deform_mball(Object *ob, ListBase *dispbase)
diff --git a/source/blender/blenkernel/intern/particle.c b/source/blender/blenkernel/intern/particle.c
index 6b754743c11..216bc94a058 100644
--- a/source/blender/blenkernel/intern/particle.c
+++ b/source/blender/blenkernel/intern/particle.c
@@ -221,12 +221,12 @@ Object *psys_find_object(Scene *scene, ParticleSystem *psys)
 }
 #endif
 
-Object *psys_get_lattice(ParticleSimulationData *sim)
+struct LatticeDeformData *psys_create_lattice_deform_data(ParticleSimulationData *sim)
 {
-	Object *lattice = NULL;
-	
-	if (psys_in_edit_mode(sim->scene, sim->psys) == 0) {
+	struct LatticeDeformData *lattice_deform_data = NULL;
 
+	if (psys_in_edit_mode(sim->scene, sim->psys) == 0) {
+		Object *lattice = NULL;
 		ModifierData *md = (ModifierData *)psys_get_modifier(sim->ob, sim->psys);
 
 		for (; md; md = md->next) {
@@ -237,10 +237,10 @@ Object *psys_get_lattice(ParticleSimulationData *sim)
 			}
 		}
 		if (lattice)
-			init_latt_deform(lattice, NULL);
+			lattice_deform_data = init_latt_deform(lattice, NULL);
 	}
 
-	return lattice;
+	return lattice_deform_data;
 }
 void psys_disable_all(Object *ob)
 {
@@ -2513,7 +2513,7 @@ static int psys_threads_init_path(ParticleThread *threads, Scene *scene, float c
 	ctx->cfra = cfra;
 	ctx->editupdate = editupdate;
 
-	psys->lattice = psys_get_lattice(&ctx->sim);
+	psys->lattice_deform_data = psys_create_lattice_deform_data(&ctx->sim);
 
 	/* cache all relevant vertex groups if they exist */
 	ctx->vg_length = psys_cache_vgroup(ctx->dm, psys, PSYS_VG_LENGTH);
@@ -2974,7 +2974,7 @@ void psys_cache_paths(ParticleSimulationData *sim, float cfra)
 	psys_free_path_cache(psys, psys->edit);
 	cache = psys->pathcache = psys_alloc_path_cache_buffers(&psys->pathcachebufs, totpart, steps + 1);
 
-	psys->lattice = psys_get_lattice(sim);
+	psys->lattice_deform_data = psys_create_lattice_deform_data(sim);
 	ma = give_current_material(sim->ob, psys->part->omat);
 	if (ma && (psys->part->draw_col == PART_DRAW_COL_MAT))
 		copy_v3_v3(col, &ma->r);
@@ -3079,9 +3079,9 @@ void psys_cache_paths(ParticleSimulationData *sim, float cfra)
 			}
 
 			/* lattices have to be calculated separately to avoid mixups between effector calculations */
-			if (psys->lattice) {
+			if (psys->lattice_deform_data) {
 				for (k = 0, ca = cache[p]; k <= steps; k++, ca++)
-					calc_latt_deform(psys->lattice, ca->co, 1.0f);
+					calc_latt_deform(psys->lattice_deform_data, ca->co, 1.0f);
 			}
 		}
 
@@ -3112,9 +3112,9 @@ void psys_cache_paths(ParticleSimulationData *sim, float cfra)
 
 	psys->totcached = totpart;
 
-	if (psys->lattice) {
-		end_latt_deform(psys->lattice);
-		psys->lattice = NULL;
+	if (psys->lattice_deform_data) {
+		end_latt_deform(psys->lattice_deform_data);
+		psys->lattice_deform_data = NULL;
 	}
 
 	if (vg_effector)
@@ -4166,8 +4166,8 @@ void psys_get_particle_on_path(ParticleSimulationData *sim, int p, ParticleKey *
 						/* TODO: proper velocity handling */
 					}
 
-					if (psys->lattice && edit == 0)
-						calc_latt_deform(psys->lattice, state->co, 1.0f);
+					if (psys->lattice_deform_data && edit == 0)
+						calc_latt_deform(psys->lattice_deform_data, state->co, 1.0f);
 				}
 			}
 		}
@@ -4402,8 +4402,8 @@ int psys_get_particle_state(ParticleSimulationData *sim, int p, ParticleKey *sta
 			unit_m4(mat);
 			do_child_modifiers(sim, NULL, key1, key1->rot, cpa, cpa->fuv, mat, state, t);
 
-			if (psys->lattice)
-				calc_latt_deform(sim->psys->lattice, state->co, 1.0f);
+			if (psys->lattice_deform_data)
+				calc_latt_deform(psys->lattice_deform_data, state->co, 1.0f);
 		}
 		else {
 			if (pa->state.time == cfra || ELEM(part->phystype, PART_PHYS_NO, PART_PHYS_KEYED))
@@ -4461,8 +4461,8 @@ int psys_get_particle_state(ParticleSimulationData *sim, int p, ParticleKey *sta
 				}
 			}
 
-			if (sim->psys->lattice)
-				calc_latt_deform(sim->psys->lattice, state->co, 1.0f);
+			if (sim->psys->lattice_deform_data)
+				calc_latt_deform(sim->psys->lattice_deform_data, state->co, 1.0f);
 		}
 		
 		return 1;
@@ -4678,9 +4678,9 @@ void psys_apply_hair_lattice(Scene *scene, Object *ob, ParticleSystem *psys)
 	sim.psys = psys;
 	sim.psmd = psys_get_modifier(ob, psys);
 
-	psys->lattice = psys_get_lattice(&sim);
+	psys->lattice_deform_data = psys_create_lattice_deform_data(&sim);
 
-	if (psys->lattice) {
+	if (psys->lattice_deform_data) {
 		ParticleData *pa = psys->particles;
 		HairKey *hkey;
 		int p, h;
@@ -4693,13 +4693,13 @@ void psys_apply_hair_lattice(Scene *scene, Object *ob, ParticleSystem *psys)
 			hkey = pa->hair;
 			for (h = 0; h < pa->totkey; h++, hkey++) {
 				mul_m4_v3(hairmat, hkey->co);
-				calc_latt_deform(psys->lattice, hkey->co, 1.0f);
+				calc_latt_deform(psys->lattice_deform_data, hkey->co, 1.0f);
 				mul_m4_v3(imat, hkey->co);
 			}
 		}
 		
-		end_latt_deform(psys->lattice);
-		psys->lattice = NULL;
+		end_latt_deform(psys->lattice_deform_data);
+		psys->lattice_deform_data = NULL;
 
 		/* protect the applied shape */
 		psys->flag |= PSYS_EDITED;
diff --git a/source/blender/blenkernel/intern/particle_system.c b/source/blender/blenkernel/intern/particle_system.c
index 16ea71204cc..ee3f3332ec3 100644
--- a/source/blender/blenkernel/intern/particle_system.c
+++ b/source/blender/blenkernel/intern/particle_system.c
@@ -1514,9 +1514,9 @@ void psys_threads_free(ParticleThread *threads)
 	if (ctx->vg_roughe)
 		MEM_freeN(ctx->vg_roughe);
 
-	if (ctx->sim.psys->lattice) {
-		end_latt_deform(ctx->sim.psys->lattice);
-		ctx->sim.psys->lattice= NULL;
+	if (ctx->sim.psys->lattice_deform_data) {
+		end_latt_deform(ctx->sim.psys->lattice_deform_data);
+		ctx->sim.psys->lattice_deform_data = NULL;
 	}
 
 	/* distribution */
@@ -4108,7 +4108,7 @@ static void save_hair(ParticleSimulationData *sim, float UNUSED(cfra))
 
 	invert_m4_m4(ob->imat, ob->obmat);
 	
-	psys->lattice= psys_get_lattice(sim);
+	psys->lattice_deform_data= psys_create_lattice_deform_data(sim);
 
 	if (psys->totpart==0) return;
 	
@@ -4479,7 +4479,7 @@ static void cached_step(ParticleSimulationData *sim, float cfra)
 		if (part->randsize > 0.0f)
 			pa->size *= 1.0f - part->randsize * PSYS_FRAND(p + 1);
 
-		psys->lattice= psys_get_lattice(sim);
+		psys->lattice_deform_data = psys_create_lattice_deform_data(sim);
 
 		dietime = pa->dietime;
 
@@ -4494,9 +4494,9 @@ static void cached_step(ParticleSimulationData *sim, float cfra)
 		else
 			pa->alive = PARS_ALIVE;
 
-		if (psys->lattice) {
-			end_latt_deform(psys->lattice);
-			psys->lattice= NULL;
+		if (psys->lattice_deform_data) {
+			end_latt_deform(psys->lattice_deform_data);
+			psys->lattice_deform_data = NULL;
 		}
 
 		if (PSYS_FRAND(p) > disp)
@@ -4777,9 +4777,9 @@ static void system_step(ParticleSimulationData *sim, float cfra)
 	update_children(sim);
 
 /* cleanup */
-	if (psys->lattice) {
-		end_latt_deform(psys->lattice);
-		psys->lattice= NULL;
+	if (psys->lattice_deform_data) {
+		end_latt_deform(psys->lattice_deform_data);
+		psys->lattice_deform_data = NULL;
 	}
 }
 
diff --git a/source/blender/editors/space_view3d/drawobject.c b/source/blender/editors/space_view3d/drawobject.c
index fcea6929531..e02e285ee58 100644
--- a/source/blender/editors/space_view3d/drawobject.c
+++ b/source/blender/editors/space_view3d/drawobject.c
@@ -4569,7 +4569,7 @@ static void draw_new_particle_system(Scene *scene, View3D *v3d, RegionView3D *rv
 		pdd->ma_col = ma_col;
 	}
 
-	psys->lattice = psys_get_lattice(&sim);
+	psys->lattice_deform_data = psys_create_lattice_deform_data(&sim);
 
 	/* circles don't use drawdata, so have to add a special case here */
 	if ((pdd || draw_as == PART_DRAW_CIRC) && draw_as != PART_DRAW_PATH) {
@@ -4895,9 +4895,9 @@ static void draw_new_particle_system(Scene *scene, View3D *v3d, RegionView3D *rv
 		pdd->flag &= ~PARTICLE_DRAW_DATA_UPDATED;
 	}
 
-	if (psys->lattice) {
-		end_latt_deform(psys->lattice);
-		psys->lattice = NULL;
+	if (psys->lattice_deform_data) {
+		end_latt_deform(psys->lattice_deform_data);
+		psys->lattice_deform_data = NULL;
 	}
 
 	if (pdd) {
diff --git a/source/blender/makesdna/DNA_lattice_types.h b/source/blender/makesdna/DNA_lattice_types.h
index 837f0c354e6..242d6f0feeb 100644
--- a/source/blender/makesdna/DNA_lattice_types.h
+++ b/source/blender/makesdna/DNA_lattice_types.h
@@ -68,10 +68,6 @@ typedef struct Lattice {
 	struct MDeformVert *dvert;
 	char vgroup[64]; /* multiply the influence, MAX_VGROUP_NAME */
 	
-	/* used while deforming, always free and NULL after use */
-	float *latticedata;
-	float latmat[4][4];
-	
 	struct EditLatt *editlatt;
 } Lattice;
 
diff --git a/source/blender/makesdna/DNA_particle_types.h b/source/blender/makesdna/DNA_particle_types.h
index 29fcaf3bf73..b7ca3066b4f 100644
--- a/source/blender/makesdna/DNA_particle_types.h
+++ b/source/blender/makesdna/DNA_particle_types.h
@@ -272,7 +272,9 @@ typedef struct ParticleSystem {
 	struct DerivedMesh *hair_in_dm, *hair_out_dm;	/* input/output for cloth simulation */
 
 	struct Object *target_ob;
-	struct Object *lattice;
+
+	struct LatticeDeformData *lattice_deform_data;		/* run-time only lattice deformation data */
+
 	struct Object *parent;					/* particles from global space -> parent space */
 
 	struct ListBase targets;				/* used for keyed and boid physics */
diff --git a/source/blender/modifiers/intern/MOD_explode.c b/source/blender/modifiers/intern/MOD_explode.c
index fe680041197..c4aa41cd566 100644
--- a/source/blender/modifiers/intern/MOD_explode.c
+++ b/source/blender/modifiers/intern/MOD_explode.c
@@ -869,7 +869,7 @@ static DerivedMesh *explodeMesh(ExplodeModifierData *emd,
 	/* getting back to object space */
 	invert_m4_m4(imat, ob->obmat);
 
-	psmd->psys->lattice = psys_get_lattice(&sim);
+	psmd->psys->lattice_deform_data = psys_create_lattice_deform_data(&sim);
 
 	/* duplicate & displace vertices */
 	ehi = BLI_edgehashIterator_new(vertpahash);
@@ -973,9 +973,9 @@ static DerivedMesh *explodeMesh(ExplodeModifierData *emd,
 	CDDM_tessfaces_to_faces(explode);
 	explode->dirty |= DM_DIRTY_NORMALS;
 
-	if (psmd->psys->lattice) {
-		end_latt_deform(psmd->psys->lattice);
-		psmd->psys->lattice = NULL;
+	if (psmd->psys->lattice_deform_data) {
+		end_latt_deform(psmd->psys->lattice_deform_data);
+		psmd->psys->lattice_deform_data = NULL;
 	}
 
 	return explode;
diff --git a/source/blender/modifiers/intern/MOD_particleinstance.c b/source/blender/modifiers/intern/MOD_particleinstance.c
index e846ce11262..c51fa329df2 100644
--- a/source/blender/modifiers/intern/MOD_particleinstance.c
+++ b/source/blender/modifiers/intern/MOD_particleinstance.c
@@ -261,7 +261,7 @@ static DerivedMesh *applyModifier(ModifierData *md, Object *ob,
 		maxloop += totloop;
 	}
 
-	psys->lattice = psys_get_lattice(&sim);
+	psys->lattice_deform_data = psys_create_lattice_deform_data(&sim);
 
 	if (psys->flag & (PSYS_HAIR_DONE | PSYS_KEYED) || psys->pointcache->flag & PTCACHE_BAKED) {
 		float min_r[3], max_r[3];
@@ -378,9 +378,9 @@ static DerivedMesh *applyModifier(ModifierData *md, Object *ob,
 
 	CDDM_calc_edges(result);
 
-	if (psys->lattice) {
-		end_latt_deform(psys->lattice);
-		psys->lattice = NULL;
+	if (psys->lattice_deform_data) {
+		end_latt_deform(psys->lattice_deform_data);
+		psys->lattice_deform_data = NULL;
 	}
 
 	if (size)
diff --git a/source/blender/render/intern/source/convertblender.c b/source/blender/render/intern/source/convertblender.c
index ab888ba198b..698c46c1e8d 100644
--- a/source/blender/render/intern/source/convertblender.c
+++ b/source/blender/render/intern/source/convertblender.c
@@ -1741,7 +1741,7 @@ static int render_new_particle_system(Render *re, ObjectRen *obr, ParticleSystem
 	}
 
 	if (path_nbr == 0)
-		psys->lattice = psys_get_lattice(&sim);
+		psys->lattice_deform_data = psys_create_lattice_deform_data(&sim);
 
 /* 3. start creating renderable things */
 	for (a=0, pa=pars; a<totpart+totchild; a++, pa++, seed++) {
@@ -2094,9 +2094,9 @@ static int render_new_particle_system(Render *re, ObjectRen *obr, ParticleSystem
 
 	psys->flag &= ~PSYS_DRAWING;
 
-	if (psys->lattice) {
-		end_latt_deform(psys->lattice);
-		psys->lattice= NULL;
+	if (psys->lattice_deform_data) {
+		end_latt_deform(psys->lattice_deform_data);
+		psys->lattice_deform_data = NULL;
 	}
 
 	if (path_nbr && (ma->mode_l & MA_TANGENT_STR)==0)
diff --git a/source/blender/render/intern/source/pointdensity.c b/source/blender/render/intern/source/pointdensity.c
index d4d6bfa5b7f..ce87888b6a0 100644
--- a/source/blender/render/intern/source/pointdensity.c
+++ b/source/blender/render/intern/source/pointdensity.c
@@ -140,7 +140,7 @@ static void pointdensity_cache_psys(Render *re, PointDensity *pd, Object *ob, Pa
 	invert_m4_m4(ob->imat, ob->obmat);
 	
 	total_particles = psys->totpart+psys->totchild;
-	psys->lattice=psys_get_lattice(&sim);
+	psys->lattice_deform_data = psys_create_lattice_deform_data(&sim);
 	
 	pd->point_tree = BLI_bvhtree_new(total_particles, 0.0, 4, 6);
 	alloc_point_data(pd, total_particles, data_used);
@@ -215,9 +215,9 @@ static void pointdensity_cache_psys(Render *re, PointDensity *pd, Object *ob, Pa
 	BLI_bvhtree_balance(pd->point_tree);
 	dm->release(dm);
 	
-	if (psys->lattice) {
-		end_latt_deform(psys->lattice);
-		psys->lattice = NULL;
+	if (psys->lattice_deform_data) {
+		end_latt_deform(psys->lattice_deform_data);
+		psys->lattice_deform_data = NULL;
 	}
 	
 	psys_render_restore(ob, psys);