diff --git a/src/mol-plugin/ui/structure/representation.tsx b/src/mol-plugin/ui/structure/representation.tsx
index 83d746d307662c5eedd6ce93b1ab7cac27df6b28..a7ddbea462fdb632ea14ea92b3e28ea8562a378c 100644
--- a/src/mol-plugin/ui/structure/representation.tsx
+++ b/src/mol-plugin/ui/structure/representation.tsx
@@ -12,6 +12,7 @@ import { ColorOptions, ParameterControls } from '../controls/parameters';
 import { Color } from '../../../mol-util/color';
 import { ButtonSelect, Options } from '../controls/common'
 import { ParamDefinition as PD } from '../../../mol-util/param-definition';
+import { VisualQuality, VisualQualityOptions } from '../../../mol-geo/geometry/base';
 
 abstract class BaseStructureRepresentationControls extends PluginUIComponent {
     onChange = (value: string) => {
@@ -94,23 +95,30 @@ export class StructureRepresentationControls extends PluginUIComponent {
     }
 
     onChange = async (p: { param: PD.Base<any>, name: string, value: any }) => {
-        if (p.name === 'showHydrogens') {
-            await this.plugin.helpers.structureRepresentation.setIgnoreHydrogens(!p.value)
+        if (p.name === 'options') {
+            await this.plugin.helpers.structureRepresentation.setIgnoreHydrogens(!p.value.showHydrogens)
+            await this.plugin.helpers.structureRepresentation.setQuality(p.value.visualQuality)
+            this.forceUpdate()
         }
-        this.forceUpdate()
     }
 
     get params () {
-        const values = this.values
+        const { options } = this.values
         return {
-            showHydrogens: PD.Boolean(values.showHydrogens)
+            options: PD.Group({
+                showHydrogens: PD.Boolean(options.showHydrogens),
+                visualQuality: PD.Select<VisualQuality>(options.visualQuality, VisualQualityOptions),
+            }, { isExpanded: true })
         }
     }
 
     get values () {
         const { structureRepresentation: rep } = this.plugin.helpers
         return {
-            showHydrogens: !rep.ignoreHydrogens
+            options: {
+                showHydrogens: !rep.ignoreHydrogens,
+                visualQuality: rep.quality,
+            }
         }
     }
 
diff --git a/src/mol-plugin/util/structure-representation-helper.ts b/src/mol-plugin/util/structure-representation-helper.ts
index f0a72891f080d1f578fba4227c3e20fcb31d5427..c2b389e75ae620508390abf7832669a9db3eb8a9 100644
--- a/src/mol-plugin/util/structure-representation-helper.ts
+++ b/src/mol-plugin/util/structure-representation-helper.ts
@@ -6,7 +6,7 @@
 
 import { PluginStateObject as PSO } from '../../mol-plugin/state/objects';
 import { StateTransforms } from '../../mol-plugin/state/transforms';
-import { StateTransformer, StateSelection, StateObjectCell, StateTransform } from '../../mol-state';
+import { StateTransformer, StateSelection, StateObjectCell, StateTransform, StateBuilder } from '../../mol-state';
 import { StructureElement, Structure, StructureSelection, QueryContext } from '../../mol-model/structure';
 import { PluginContext } from '../context';
 import { StructureRepresentation3DHelpers } from '../state/transforms/representation';
@@ -14,8 +14,10 @@ import Expression from '../../mol-script/language/expression';
 import { compile } from '../../mol-script/runtime/query/compiler';
 import { StructureSelectionQueries as Q } from '../util/structure-selection-helper';
 import { MolScriptBuilder as MS } from '../../mol-script/language/builder';
+import { VisualQuality } from '../../mol-geo/geometry/base';
 
 type StructureTransform = StateObjectCell<PSO.Molecule.Structure, StateTransform<StateTransformer<any, PSO.Molecule.Structure, any>>>
+type RepresentationTransform = StateObjectCell<PSO.Molecule.Structure.Representation3D, StateTransform<StateTransformer<any, PSO.Molecule.Structure.Representation3D, any>>>
 const RepresentationManagerTag = 'representation-controls'
 
 export function getRepresentationManagerTag(type: string) {
@@ -65,9 +67,10 @@ export class StructureRepresentationHelper {
         } else {
             const combinedLoci = getCombinedLoci(modifier, loci, StructureElement.Loci(s, []))
             const params = StructureRepresentation3DHelpers.getDefaultParams(this.plugin, type as any, s)
-            if (params.type.params.ignoreHydrogens !== undefined) {
-                params.type.params.ignoreHydrogens = this._ignoreHydrogens
-            }
+
+            const p = params.type.params
+            if (p.ignoreHydrogens !== undefined) p.ignoreHydrogens = this._ignoreHydrogens
+            if (p.quality !== undefined) p.quality = this._quality
 
             update.to(structure.transform.ref)
                 .apply(
@@ -119,34 +122,52 @@ export class StructureRepresentationHelper {
         await this.plugin.runTask(state.updateTree(update, { doNotUpdateCurrent: true }))
     }
 
-    private _ignoreHydrogens = false
-    get ignoreHydrogens () { return this._ignoreHydrogens }
-    async setIgnoreHydrogens(ignoreHydrogens: boolean) {
-        if (ignoreHydrogens === this._ignoreHydrogens) return
-
+    async eachRepresentation(callback: (repr: RepresentationTransform, update: StateBuilder.Root) => void) {
         const { registry } = this.plugin.structureRepresentation
         const state = this.plugin.state.dataState;
         const update = state.build()
         const structures = state.select(StateSelection.Generators.rootsOfType(PSO.Molecule.Structure))
-
         for (const structure of structures) {
             for (let i = 0, il = registry.types.length; i < il; ++i) {
-                const type = registry.types[i][0]
-                const repr = this.getRepresentation(structure.transform.ref, type)
-                if (repr && repr.params && repr.params.values.type.params.ignoreHydrogens !== undefined) {
-                    const { name, params } = repr.params.values.type
-                    update.to(repr.transform.ref).update(
-                        StateTransforms.Representation.StructureRepresentation3D,
-                        props => ({ ...props, type: { name, params: { ...params, ignoreHydrogens }}})
-                    )
-                }
+                const repr = this.getRepresentation(structure.transform.ref, registry.types[i][0])
+                if (repr) callback(repr, update)
             }
         }
         await this.plugin.runTask(state.updateTree(update, { doNotUpdateCurrent: true }))
+    }
 
+    private _ignoreHydrogens = false
+    get ignoreHydrogens () { return this._ignoreHydrogens }
+    async setIgnoreHydrogens(ignoreHydrogens: boolean) {
+        if (ignoreHydrogens === this._ignoreHydrogens) return
+        await this.eachRepresentation((repr, update) => {
+            if (repr.params && repr.params.values.type.params.ignoreHydrogens !== undefined) {
+                const { name, params } = repr.params.values.type
+                update.to(repr.transform.ref).update(
+                    StateTransforms.Representation.StructureRepresentation3D,
+                    props => ({ ...props, type: { name, params: { ...params, ignoreHydrogens }}})
+                )
+            }
+        })
         this._ignoreHydrogens = ignoreHydrogens
     }
 
+    private _quality = 'auto' as VisualQuality
+    get quality () { return this._quality }
+    async setQuality(quality: VisualQuality) {
+        if (quality === this._quality) return
+        await this.eachRepresentation((repr, update) => {
+            if (repr.params && repr.params.values.type.params.quality !== undefined) {
+                const { name, params } = repr.params.values.type
+                update.to(repr.transform.ref).update(
+                    StateTransforms.Representation.StructureRepresentation3D,
+                    props => ({ ...props, type: { name, params: { ...params, quality }}})
+                )
+            }
+        })
+        this._quality = quality
+    }
+
     async preset() {
         // TODO generalize and make configurable
         await this.clear()