if (brush->sculpt_tool == SCULPT_TOOL_ELASTIC_DEFORM) {
  /* Elastic deformations in any brush need all nodes to avoid artifacts as the effect
    * of the Kelvinlet is not constrained by the radius. */
  return true;
}

if (brush->sculpt_tool == SCULPT_TOOL_POSE) {
  /* Pose needs all nodes because it applies all symmetry iterations at the same time
    * and the IK chain can grow to any area of the model. */
  /* TODO: This can be optimized by filtering the nodes after calculating the chain. */
  return true;
}

if (brush->sculpt_tool == SCULPT_TOOL_POSE) {
  /* Boundary needs all nodes because it is not possible to know where the boundary
    * deformation is going to be propagated before calculating it. */
  /* TODO: after calculating the boudnary info in the first iteration, it should be
    * possible to get the nodes that have vertices included in any boundary deformation
    * and cache them. */
  return true;
}

if (brush->sculpt_tool == SCULPT_TOOL_SNAKE_HOOK && brush->snake_hook_deform_type == BRUSH_SNAKE_HOOK_DEFORM_ELASTIC) {
  /* Snake hook in elastic deform type has same requirements as the elastic deform tool. */
  return true;
}