diff --git a/projects/ccf-rui/src/app/app-web-component.component.ts b/projects/ccf-rui/src/app/app-web-component.component.ts
index 878312a1f..ae6f0297f 100644
--- a/projects/ccf-rui/src/app/app-web-component.component.ts
+++ b/projects/ccf-rui/src/app/app-web-component.component.ts
@@ -45,6 +45,7 @@ export class AppWebComponent extends BaseWebComponent {
   @Input() homeUrl: string;
   @Input() logoTooltip: string;
   @Input() organOptions: string | string[];
+  @Input() collisionsEndpoint: string;
 
   initialized: boolean;
 
diff --git a/projects/ccf-rui/src/app/core/services/config/config.ts b/projects/ccf-rui/src/app/core/services/config/config.ts
index 5fdba46ca..7e2f9507d 100644
--- a/projects/ccf-rui/src/app/core/services/config/config.ts
+++ b/projects/ccf-rui/src/app/core/services/config/config.ts
@@ -27,6 +27,8 @@ export interface GlobalConfig {
   homeUrl?: string;
   logoTooltip?: string;
   organOptions?: string[];
+
+  collisionsEndpoint?: string;
 }
 
 export interface OrganConfig {
diff --git a/projects/ccf-rui/src/app/core/store/model/model.state.ts b/projects/ccf-rui/src/app/core/store/model/model.state.ts
index a7af9eeaf..180ced7c4 100644
--- a/projects/ccf-rui/src/app/core/store/model/model.state.ts
+++ b/projects/ccf-rui/src/app/core/store/model/model.state.ts
@@ -7,7 +7,7 @@ import { filterNulls } from 'ccf-shared/rxjs-ext/operators';
 import { sortBy } from 'lodash';
 import { GoogleAnalyticsService } from 'ngx-google-analytics';
 import { EMPTY, Observable } from 'rxjs';
-import { delay, distinctUntilChanged, filter, map, skipUntil, switchMap, tap, throttleTime } from 'rxjs/operators';
+import { delay, distinct, distinctUntilChanged, filter, map, skipUntil, switchMap, tap, throttleTime } from 'rxjs/operators';
 
 import { ExtractionSet } from '../../models/extraction-set';
 import { VisibilityItem } from '../../models/visibility-item';
@@ -114,37 +114,37 @@ export const RUI_ORGANS = ALL_ORGANS;
 @Injectable()
 export class ModelState extends NgxsImmutableDataRepository<ModelStateModel> {
   /** Identifier observable */
-  readonly id$ = this.state$.pipe(map(x => x?.id));
+  readonly id$ = this.state$.pipe(map(x => x?.id), distinct());
   /** Block size observable */
-  readonly blockSize$ = this.state$.pipe(map(x => x?.blockSize));
+  readonly blockSize$ = this.state$.pipe(map(x => x?.blockSize), distinct());
   /** Rotation observable */
-  readonly rotation$ = this.state$.pipe(map(x => x?.rotation));
+  readonly rotation$ = this.state$.pipe(map(x => x?.rotation), distinct());
   /** Position observable */
-  readonly position$ = this.state$.pipe(map(x => x?.position));
+  readonly position$ = this.state$.pipe(map(x => x?.position), distinct());
   /** Slice configuration observable */
-  readonly slicesConfig$ = this.state$.pipe(map(x => x?.slicesConfig));
+  readonly slicesConfig$ = this.state$.pipe(map(x => x?.slicesConfig), distinct());
   /** View type observable */
-  readonly viewType$ = this.state$.pipe(map(x => x?.viewType));
+  readonly viewType$ = this.state$.pipe(map(x => x?.viewType), distinct());
   /** View side observable */
-  readonly viewSide$ = this.state$.pipe(map(x => x?.viewSide));
+  readonly viewSide$ = this.state$.pipe(map(x => x?.viewSide), distinct());
   /** Organ observable */
-  readonly organ$ = this.state$.pipe(map(x => x?.organ));
+  readonly organ$ = this.state$.pipe(map(x => x?.organ), distinct());
   /** Organ IRI observable */
-  readonly organIri$ = this.state$.pipe(map(x => x?.organIri));
+  readonly organIri$ = this.state$.pipe(map(x => x?.organIri), distinct());
   /** Organ IRI observable */
-  readonly organDimensions$ = this.state$.pipe(map(x => x?.organDimensions));
+  readonly organDimensions$ = this.state$.pipe(map(x => x?.organDimensions), distinct());
   /** Sex observable */
-  readonly sex$ = this.state$.pipe(map(x => x?.sex));
+  readonly sex$ = this.state$.pipe(map(x => x?.sex), distinct());
   /** Side observable */
-  readonly side$ = this.state$.pipe(map(x => x?.side));
+  readonly side$ = this.state$.pipe(map(x => x?.side), distinct());
   /** Show previous observable */
-  readonly showPrevious$ = this.state$.pipe(map(x => x?.showPrevious));
+  readonly showPrevious$ = this.state$.pipe(map(x => x?.showPrevious), distinct());
   /** Extraction sites observable */
-  readonly extractionSites$ = this.state$.pipe(map(x => x?.extractionSites));
+  readonly extractionSites$ = this.state$.pipe(map(x => x?.extractionSites), distinct());
   /** Anatomical structures observable */
-  readonly anatomicalStructures$ = this.state$.pipe(map(x => x?.anatomicalStructures));
+  readonly anatomicalStructures$ = this.state$.pipe(map(x => x?.anatomicalStructures), distinct());
   /** Extraction sets observable */
-  readonly extractionSets$ = this.state$.pipe(map(x => x?.extractionSets));
+  readonly extractionSets$ = this.state$.pipe(map(x => x?.extractionSets), distinct());
 
   @Computed()
   get modelChanged$(): Observable<void> {
diff --git a/projects/ccf-rui/src/app/core/store/registration/registration.state.ts b/projects/ccf-rui/src/app/core/store/registration/registration.state.ts
index 997e0f35e..c9fee5563 100644
--- a/projects/ccf-rui/src/app/core/store/registration/registration.state.ts
+++ b/projects/ccf-rui/src/app/core/store/registration/registration.state.ts
@@ -10,7 +10,7 @@ import { GlobalConfigState, OrganInfo } from 'ccf-shared';
 import { filterNulls } from 'ccf-shared/rxjs-ext/operators';
 import { saveAs } from 'file-saver';
 import { Observable, combineLatest } from 'rxjs';
-import { map, startWith, switchMap, take, tap, throttleTime } from 'rxjs/operators';
+import { distinctUntilChanged, map, startWith, switchMap, take, tap, throttleTime } from 'rxjs/operators';
 import { v4 as uuidV4 } from 'uuid';
 
 import { Tag } from '../../models/anatomical-structure-tag';
@@ -20,6 +20,7 @@ import { AnatomicalStructureTagState } from '../anatomical-structure-tags/anatom
 import { ModelState, ModelStateModel, RUI_ORGANS, XYZTriplet } from '../model/model.state';
 import { PageState, PageStateModel } from '../page/page.state';
 import { ReferenceDataState } from '../reference-data/reference-data.state';
+import { isEqual } from 'lodash';
 
 
 /**
@@ -74,7 +75,8 @@ export class RegistrationState extends NgxsImmutableDataRepository<RegistrationS
   @Computed()
   get throttledJsonld$(): Observable<Record<string, unknown>> {
     return combineLatest([this.page.state$, this.model.state$, this.tags.tags$]).pipe(
-      throttleTime(JSONLD_THROTTLE_DURATION, undefined, { leading: false, trailing: true }),
+      throttleTime(JSONLD_THROTTLE_DURATION, undefined, { leading: true, trailing: true }),
+      distinctUntilChanged(isEqual),
       map(([page, model, tags]) => this.buildJsonLd(page, model, tags))
     );
   }
diff --git a/projects/ccf-rui/src/app/core/store/scene/scene.state.ts b/projects/ccf-rui/src/app/core/store/scene/scene.state.ts
index 474f2b1de..68ac07f13 100644
--- a/projects/ccf-rui/src/app/core/store/scene/scene.state.ts
+++ b/projects/ccf-rui/src/app/core/store/scene/scene.state.ts
@@ -7,12 +7,15 @@ import { HttpClient } from '@angular/common/http';
 import { Injectable, Injector } from '@angular/core';
 import { Matrix4, toRadians } from '@math.gl/core';
 import { NgxsOnInit, State } from '@ngxs/store';
+import { AABB, Vec3 } from 'cannon-es';
 import { SpatialEntityJsonLd, SpatialSceneNode } from 'ccf-body-ui';
 import { SpatialEntity, SpatialPlacement, getOriginScene, getTissueBlockScene } from 'ccf-database';
-import { Position } from 'ccf-shared';
+import { GlobalConfigState, Position } from 'ccf-shared';
+import { isEqual } from 'lodash';
 import { Observable, combineLatest, defer, of } from 'rxjs';
-import { filter, map, share, startWith, switchMap, throttleTime } from 'rxjs/operators';
+import { catchError, concatMap, distinctUntilChanged, filter, map, share, startWith, switchMap, take, throttleTime } from 'rxjs/operators';
 import { environment } from '../../../../environments/environment';
+import { GlobalConfig } from '../../services/config/config';
 import { ModelState } from '../model/model.state';
 import { RegistrationState } from '../registration/registration.state';
 import { VisibilityItem } from './../../models/visibility-item';
@@ -27,9 +30,23 @@ export interface SceneStateModel {
   showCollisions: boolean;
 }
 
-const NODE_COLLISION_THROTTLE_DURATION = 100;
+interface Collision {
+  id: string;
+}
+
+const NODE_COLLISION_THROTTLE_DURATION = 10;
 
-const DEFAULT_ENDPOINT = 'https://pfn8zf2gtu.us-east-2.awsapprunner.com/get-collisions';
+const DEFAULT_COLLISIONS_ENDPOINT = 'https://pfn8zf2gtu.us-east-2.awsapprunner.com/get-collisions';
+
+function getNodeBbox(model: SpatialSceneNode): AABB {
+  const mat = new Matrix4(model.transformMatrix);
+  const lowerBound = mat.transformAsPoint([-1, -1, -1], []);
+  const upperBound = mat.transformAsPoint([1, 1, 1], []);
+  return new AABB({
+    lowerBound: new Vec3(...lowerBound.map((n, i) => Math.min(n, upperBound[i]))),
+    upperBound: new Vec3(...upperBound.map((n, i) => Math.max(n, lowerBound[i])))
+  });
+}
 
 /**
  * 3d Scene state
@@ -107,20 +124,23 @@ export class SceneState extends NgxsImmutableDataRepository<SceneStateModel> imp
             }
           })
           .reduce<SpatialSceneNode[]>((acc, nodes) => acc.concat(nodes), [])
-      )
+      ),
+      distinctUntilChanged(isEqual)
     );
   }
 
   @Computed()
   get nodeCollisions$(): Observable<SpatialSceneNode[]> {
-    const collisions$ = defer(() => this.registration.throttledJsonld$).pipe(
-      switchMap((jsonld) => this.getCollisions(jsonld)),
-      startWith([])
-    ) as Observable<object[]>;
-
-    return combineLatest([this.referenceOrganSimpleNodes$, collisions$]).pipe(
+    return combineLatest([this.referenceOrganSimpleNodes$, this.collisions$, this.placementCube$]).pipe(
       throttleTime(NODE_COLLISION_THROTTLE_DURATION, undefined, { leading: true, trailing: true }),
-      map(([nodes, collisions]) => this.filterNodeCollisions(nodes, collisions)),
+      map(([nodes, collisions, placement]) => {
+        if (collisions !== undefined) {
+          return this.filterNodeCollisions(nodes, collisions);
+        } else if (placement.length > 0) {
+          return this.filterNodeBBox(nodes, placement[0]);
+        }
+        return [];
+      }),
       share()
     );
   }
@@ -178,9 +198,10 @@ export class SceneState extends NgxsImmutableDataRepository<SceneStateModel> imp
   }
 
   @Computed()
-  get placementCube$(): Observable<SpatialSceneNode[]> | [] {
+  get placementCube$(): Observable<SpatialSceneNode[]> {
     return combineLatest([this.model.viewType$, this.model.blockSize$, this.model.rotation$, this.model.position$, this.model.organ$]).pipe(
-      map(([_viewType, _blockSize, _rotation, _position, organ]) => organ.src === '' ? [] : [this.placementCube])
+      map(([_viewType, _blockSize, _rotation, _position, organ]) => organ.src === '' ? [] : [this.placementCube]),
+      distinctUntilChanged(isEqual)
     );
   }
 
@@ -245,6 +266,14 @@ export class SceneState extends NgxsImmutableDataRepository<SceneStateModel> imp
   private registration: RegistrationState;
   private referenceData: ReferenceDataState;
 
+  @Computed()
+  private get collisions$(): Observable<Collision[] | undefined> {
+    return defer(() => this.registration.throttledJsonld$).pipe(
+      concatMap((jsonld) => this.getCollisions(jsonld)),
+      startWith([])
+    );
+  }
+
   /**
    * Creates an instance of scene state.
    *
@@ -252,7 +281,8 @@ export class SceneState extends NgxsImmutableDataRepository<SceneStateModel> imp
    */
   constructor(
     private readonly injector: Injector,
-    private readonly http: HttpClient
+    private readonly http: HttpClient,
+    private readonly globalConfig: GlobalConfigState<GlobalConfig>,
   ) {
     super();
   }
@@ -299,14 +329,24 @@ export class SceneState extends NgxsImmutableDataRepository<SceneStateModel> imp
     return db.organSpatialEntities[organIri] as SpatialEntity;
   }
 
-  private getCollisions(jsonld: unknown): Observable<unknown> {
-    return this.http.post(DEFAULT_ENDPOINT, JSON.stringify(jsonld), {
-      headers: { 'Content-Type': 'application/json' }
-    });
+  private getCollisions(jsonld: unknown): Observable<Collision[] | undefined> {
+    return this.globalConfig.getOption('collisionsEndpoint').pipe(
+      switchMap((endpoint = DEFAULT_COLLISIONS_ENDPOINT) => this.http.post<Collision[]>(
+        endpoint, JSON.stringify(jsonld),
+        { headers: { 'Content-Type': 'application/json' } }
+      )),
+      catchError(() => of(undefined)),
+      take(1)
+    );
   }
 
-  private filterNodeCollisions(nodes: SpatialSceneNode[], collisions: object[]): SpatialSceneNode[] {
-    const collidedIds = new Set(collisions.map(node => node['id']));
+  private filterNodeCollisions(nodes: SpatialSceneNode[], collisions: Collision[]): SpatialSceneNode[] {
+    const collidedIds = new Set(collisions.map(node => node.id));
     return nodes.filter(node => collidedIds.has(node['@id']));
   }
+
+  private filterNodeBBox(nodes: SpatialSceneNode[], placement: SpatialSceneNode): SpatialSceneNode[] {
+    const bbox = getNodeBbox(placement);
+    return nodes.filter((model) => bbox.overlaps(getNodeBbox(model)));
+  }
 }