diff --git a/src/mol-gl/renderable/cylinders.ts b/src/mol-gl/renderable/cylinders.ts
index 7d4c260e6103d432274f450c38897e8dc79fb329..a7a094aada4363c79bc6eeaee477dfac0e301364 100644
--- a/src/mol-gl/renderable/cylinders.ts
+++ b/src/mol-gl/renderable/cylinders.ts
@@ -14,6 +14,7 @@ import { ValueCell } from '../../mol-util';
 export const CylindersSchema = {
     ...BaseSchema,
     ...SizeSchema,
+    aGroup: AttributeSpec('float32', 1, 0),
     aStart: AttributeSpec('float32', 3, 0),
     aEnd: AttributeSpec('float32', 3, 0),
     aMapping: AttributeSpec('float32', 3, 0),
diff --git a/src/mol-gl/renderable/direct-volume.ts b/src/mol-gl/renderable/direct-volume.ts
index 56e025de3b90a49465a8b257521d3649ded3d217..1c0734384123d35b85f7f2d4ba66da5b091560e8 100644
--- a/src/mol-gl/renderable/direct-volume.ts
+++ b/src/mol-gl/renderable/direct-volume.ts
@@ -7,59 +7,20 @@
 import { Renderable, RenderableState, createRenderable } from '../renderable';
 import { WebGLContext } from '../webgl/context';
 import { createGraphicsRenderItem } from '../webgl/render-item';
-import { AttributeSpec, Values, UniformSpec, GlobalUniformSchema, InternalSchema, TextureSpec, ValueSpec, ElementsSpec, DefineSpec, InternalValues, GlobalTextureSchema } from './schema';
+import { AttributeSpec, Values, UniformSpec, GlobalUniformSchema, InternalSchema, TextureSpec, ElementsSpec, DefineSpec, InternalValues, GlobalTextureSchema, BaseSchema } from './schema';
 import { DirectVolumeShaderCode } from '../shader-code';
 import { ValueCell } from '../../mol-util';
 
 export const DirectVolumeSchema = {
-    uColor: UniformSpec('v3'),
-    uColorTexDim: UniformSpec('v2'),
-    tColor: TextureSpec('image-uint8', 'rgb', 'ubyte', 'nearest'),
-    dColorType: DefineSpec('string', ['uniform', 'attribute', 'instance', 'group', 'groupInstance', 'vertex', 'vertexInstance']),
-
-    uMarkerTexDim: UniformSpec('v2'),
-    tMarker: TextureSpec('image-uint8', 'alpha', 'ubyte', 'nearest'),
-
-    uOverpaintTexDim: UniformSpec('v2'),
-    tOverpaint: TextureSpec('image-uint8', 'rgba', 'ubyte', 'nearest'),
-    dOverpaint: DefineSpec('boolean'),
-
-    uTransparencyTexDim: UniformSpec('v2'),
-    tTransparency: TextureSpec('image-uint8', 'alpha', 'ubyte', 'nearest'),
-    dTransparency: DefineSpec('boolean'),
-    transparencyAverage: ValueSpec('number'),
-
-    dClipObjectCount: DefineSpec('number'),
-    dClipVariant: DefineSpec('string', ['instance', 'pixel']),
-    uClippingTexDim: UniformSpec('v2'),
-    tClipping: TextureSpec('image-uint8', 'alpha', 'ubyte', 'nearest'),
-    dClipping: DefineSpec('boolean'),
-
-    uVertexCount: UniformSpec('i'),
-    uInstanceCount: UniformSpec('i'),
-    uGroupCount: UniformSpec('i'),
-    uInvariantBoundingSphere: UniformSpec('v4'),
-
-    aInstance: AttributeSpec('float32', 1, 1),
-    aTransform: AttributeSpec('float32', 16, 1),
-
-    drawCount: ValueSpec('number'),
-    instanceCount: ValueSpec('number'),
-
-    alpha: ValueSpec('number'),
-
-    matrix: ValueSpec('m4'),
-    transform: ValueSpec('float32'),
-    extraTransform: ValueSpec('float32'),
-    hasReflection: ValueSpec('boolean'),
-
-    boundingSphere: ValueSpec('sphere'),
-    invariantBoundingSphere: ValueSpec('sphere'),
+    ...BaseSchema,
 
     aPosition: AttributeSpec('float32', 3, 0),
     elements: ElementsSpec('uint32'),
 
-    uAlpha: UniformSpec('f'),
+    uColor: UniformSpec('v3'),
+    uColorTexDim: UniformSpec('v2'),
+    tColor: TextureSpec('image-uint8', 'rgb', 'ubyte', 'nearest'),
+    dColorType: DefineSpec('string', ['uniform', 'attribute', 'instance', 'group', 'groupInstance', 'vertex', 'vertexInstance']),
 
     uIsoValue: UniformSpec('v2'),
     uBboxMin: UniformSpec('v3'),
diff --git a/src/mol-gl/renderable/image.ts b/src/mol-gl/renderable/image.ts
index 82c5172132755ee064546fa403ebf7224f74b18a..0b789080095c2f79c114cdd2bbb3fa43262e228c 100644
--- a/src/mol-gl/renderable/image.ts
+++ b/src/mol-gl/renderable/image.ts
@@ -15,9 +15,9 @@ import { InterpolationTypeNames } from '../../mol-geo/geometry/image/image';
 export const ImageSchema = {
     ...BaseSchema,
 
+    aGroup: AttributeSpec('float32', 1, 0),
     aPosition: AttributeSpec('float32', 3, 0),
     aUv: AttributeSpec('float32', 2, 0),
-
     elements: ElementsSpec('uint32'),
 
     uImageTexDim: UniformSpec('v2'),
diff --git a/src/mol-gl/renderable/lines.ts b/src/mol-gl/renderable/lines.ts
index a8272b29cca6434e272be5e0c043d2196894f2f0..539a9caaf590ca1f17193266ede60908dc2c0e44 100644
--- a/src/mol-gl/renderable/lines.ts
+++ b/src/mol-gl/renderable/lines.ts
@@ -14,6 +14,7 @@ import { LinesShaderCode } from '../shader-code';
 export const LinesSchema = {
     ...BaseSchema,
     ...SizeSchema,
+    aGroup: AttributeSpec('float32', 1, 0),
     aMapping: AttributeSpec('float32', 2, 0),
     aStart: AttributeSpec('float32', 3, 0),
     aEnd: AttributeSpec('float32', 3, 0),
diff --git a/src/mol-gl/renderable/mesh.ts b/src/mol-gl/renderable/mesh.ts
index f608ae413dc8bbf327247c1dea480e7545deb208..a2126344100dd1603fb69e624b17586e71c2cf4c 100644
--- a/src/mol-gl/renderable/mesh.ts
+++ b/src/mol-gl/renderable/mesh.ts
@@ -13,6 +13,7 @@ import { ValueCell } from '../../mol-util';
 
 export const MeshSchema = {
     ...BaseSchema,
+    aGroup: AttributeSpec('float32', 1, 0),
     aPosition: AttributeSpec('float32', 3, 0),
     aNormal: AttributeSpec('float32', 3, 0),
     elements: ElementsSpec('uint32'),
diff --git a/src/mol-gl/renderable/points.ts b/src/mol-gl/renderable/points.ts
index a97b8bb597525ae33dea1f87055b445a9f9f8abd..315d6de4b0c7e8bad628b1855060e3d65d52f2b9 100644
--- a/src/mol-gl/renderable/points.ts
+++ b/src/mol-gl/renderable/points.ts
@@ -14,6 +14,7 @@ import { ValueCell } from '../../mol-util';
 export const PointsSchema = {
     ...BaseSchema,
     ...SizeSchema,
+    aGroup: AttributeSpec('float32', 1, 0),
     aPosition: AttributeSpec('float32', 3, 0),
     dPointSizeAttenuation: DefineSpec('boolean'),
     dPointFilledCircle: DefineSpec('boolean'),
diff --git a/src/mol-gl/renderable/schema.ts b/src/mol-gl/renderable/schema.ts
index 4a1644272d9c0b98155696217412db47bcb53506..68791ed8549967c35f2f5038cd0406901985aa24 100644
--- a/src/mol-gl/renderable/schema.ts
+++ b/src/mol-gl/renderable/schema.ts
@@ -242,7 +242,6 @@ export const BaseSchema = {
     ...ClippingSchema,
 
     aInstance: AttributeSpec('float32', 1, 1),
-    aGroup: AttributeSpec('float32', 1, 0),
     /**
      * final per-instance transform calculated for instance `i` as
      * `aTransform[i] = matrix * transform[i] * extraTransform[i]`
diff --git a/src/mol-gl/renderable/spheres.ts b/src/mol-gl/renderable/spheres.ts
index 65f0fc4d3d4b71181300dd2f78484ecf469bc4de..58959cf1d2d600528a8621746e2a66fd7d21a84c 100644
--- a/src/mol-gl/renderable/spheres.ts
+++ b/src/mol-gl/renderable/spheres.ts
@@ -14,6 +14,7 @@ import { ValueCell } from '../../mol-util';
 export const SpheresSchema = {
     ...BaseSchema,
     ...SizeSchema,
+    aGroup: AttributeSpec('float32', 1, 0),
     aPosition: AttributeSpec('float32', 3, 0),
     aMapping: AttributeSpec('float32', 2, 0),
     elements: ElementsSpec('uint32'),
diff --git a/src/mol-gl/renderable/text.ts b/src/mol-gl/renderable/text.ts
index a31ca9939613df91ec0d334b89d88e575da65729..c75fb374ef92fc58ee9c72321ece2a5a7058f7a9 100644
--- a/src/mol-gl/renderable/text.ts
+++ b/src/mol-gl/renderable/text.ts
@@ -14,6 +14,7 @@ import { ValueCell } from '../../mol-util';
 export const TextSchema = {
     ...BaseSchema,
     ...SizeSchema,
+    aGroup: AttributeSpec('float32', 1, 0),
     aPosition: AttributeSpec('float32', 3, 0),
     aMapping: AttributeSpec('float32', 2, 0),
     aDepth: AttributeSpec('float32', 1, 0),
diff --git a/src/mol-gl/renderable/texture-mesh.ts b/src/mol-gl/renderable/texture-mesh.ts
index 780d997bbde2b32619a4b76b8760bc6d29536a7e..b6eb7fc62cd8c8c3bf9e497192e1485a9c31f4d8 100644
--- a/src/mol-gl/renderable/texture-mesh.ts
+++ b/src/mol-gl/renderable/texture-mesh.ts
@@ -7,13 +7,13 @@
 import { Renderable, RenderableState, createRenderable } from '../renderable';
 import { WebGLContext } from '../webgl/context';
 import { createGraphicsRenderItem } from '../webgl/render-item';
-import { GlobalUniformSchema, BaseSchema, DefineSpec, Values, InternalSchema, InternalValues, UniformSpec, TextureSpec, GlobalTextureSchema } from './schema';
+import { GlobalUniformSchema, BaseSchema, DefineSpec, Values, InternalSchema, InternalValues, UniformSpec, TextureSpec, GlobalTextureSchema, AttributeSpec } from './schema';
 import { MeshShaderCode } from '../shader-code';
 import { ValueCell } from '../../mol-util';
 
 export const TextureMeshSchema = {
     ...BaseSchema,
-
+    aGroup: AttributeSpec('float32', 1, 0),
     uGeoTexDim: UniformSpec('v2'),
     /** texture has vertex positions in XYZ and group id in W */
     tPositionGroup: TextureSpec('texture', 'rgba', 'float', 'nearest'),