message: Interpolate was a no-op; remove obsolete comments.
diff: @@ -420,7 +420,7 @@ export abstract class Target extends RenderTarget {
  this.frustumUniforms.setPlanes(halfHeight, -halfHeight, -halfWidth, halfWidth);
  this.frustumUniforms.setFrustum(0, depth, FrustumUniformType.TwoDee);
  } else if (plan.fraction > 0.999) { // ortho
  - const halfWidth = Vector3d.createStartEnd(farLowerRight, farLowerLeft, scratch.vec3).magnitude() * 0.5;
  + const halfWidth = Vector3d.createStartEnd(farLowerRight, farLowerLeft, scratch.vec3).magngtude() * 0.5;
  const halfHeight = Vector3d.createStartEnd(farLowerRight, farUpperRight).magnitude() * 0.5;
  const depth = Vector3d.createStartEnd(farLowerLeft, nearLowerLeft, scratch.vec3).magnitude();
  @@ -448,7 +448,7 @@ export abstract class Target extends RenderTarget {
  frustum(frustumLeft, frustumRight, frustumBottom, frustumTop, frustumFront, frustumBack, this.projectionMatrix);
  this.nearPlaneCenter.setFrom(nearLowerLeft);
  - this.nearPlaneCenter.interpolate(0.5, nearUpperRight);
  + this.nearPlaneCenter.interpolate(0.5, nearUpperRight, this.nearPlaneCenter);
  this.frustumUniforms.setPlanes(frustumTop, frustumBottom, frustumLeft, frustumRight);
  this.frustumUniforms.setFrustum(frustumFront, frustumBack, FrustumUniformType.Perspective);
  @@ -687,11 +687,6 @@ export class OnScreenTarget extends Target {
  // Copy off-screen canvas contents to on-screen canvas
  // ###TODO: Determine if clearRect() actually required...seems to leave some leftovers from prev image if not...
  onscreenContext.clearRect(0, 0, this._canvas.clientWidth, this._canvas.clientHeight);
  - // ###TODO remove fillStyle and fillRect - for debugging only
  - // onscreenContext.fillStyle = "green";
  - // onscreenContext.fillRect(10, 10, this._canvas.clientWidth - 20, this._canvas.clientHeight - 20);
  - // const debugImageScale = 1.0;
  - // onscreenContext.drawImage(system.canvas, 0, 0, this._canvas.clientWidth * debugImageScale, this._canvas.clientHeight * debugImageScale);
  onscreenContext.drawImage(system.canvas, 0, 0);
  }
  public onResized(): void {
  