message: fix uMarker not being updated
diff: @@ -210,7 +210,7 @@ export type SizeSchema = typeof SizeSchema
  export type SizeValues = Values<SizeSchema>
  export const MarkerSchema = {
  - uMarker: UniformSpec('f', 'material'),
  + uMarker: UniformSpec('f'),
  uMarkerTexDim: UniformSpec('v2'),
  tMarker: TextureSpec('image-uint8', 'alpha', 'ubyte', 'nearest'),
  dMarkerType: DefineSpec('string', ['uniform', 'groupInstance']),
  