diff --git a/core/java/android/hardware/camera2/CameraCharacteristics.java b/core/java/android/hardware/camera2/CameraCharacteristics.java
index 3672de4f8d003..f06ffaa66c3cb 100644
--- a/core/java/android/hardware/camera2/CameraCharacteristics.java
+++ b/core/java/android/hardware/camera2/CameraCharacteristics.java
@@ -167,7 +167,9 @@ public final class CameraCharacteristics extends CameraMetadata {
     /**
      * <p>Maximum and minimum exposure compensation
      * setting, in counts of
-     * android.control.aeCompensationStepSize</p>
+     * {@link CameraCharacteristics#CONTROL_AE_COMPENSATION_STEP android.control.aeCompensationStep}.</p>
+     *
+     * @see CameraCharacteristics#CONTROL_AE_COMPENSATION_STEP
      */
     public static final Key<int[]> CONTROL_AE_COMPENSATION_RANGE =
             new Key<int[]>("android.control.aeCompensationRange", int[].class);
@@ -446,12 +448,16 @@ public final class CameraCharacteristics extends CameraMetadata {
      * <p>The maximum numbers of any type of input streams
      * that can be configured and used simultaneously by a camera device.</p>
      * <p>When set to 0, it means no input stream is supported.</p>
-     * <p>The image format for a input stream can be any supported format provided
-     * by android.scaler.availableInputFormats. When using an input stream, there must be
-     * at least one output stream configured to to receive the reprocessed images.</p>
+     * <p>The image format for a input stream can be any supported
+     * format provided by
+     * {@link CameraCharacteristics#SCALER_AVAILABLE_INPUT_OUTPUT_FORMATS_MAP android.scaler.availableInputOutputFormatsMap}. When using an
+     * input stream, there must be at least one output stream
+     * configured to to receive the reprocessed images.</p>
      * <p>For example, for Zero Shutter Lag (ZSL) still capture use case, the input
      * stream image format will be RAW_OPAQUE, the associated output stream image format
      * should be JPEG.</p>
+     *
+     * @see CameraCharacteristics#SCALER_AVAILABLE_INPUT_OUTPUT_FORMATS_MAP
      */
     public static final Key<Integer> REQUEST_MAX_NUM_INPUT_STREAMS =
             new Key<Integer>("android.request.maxNumInputStreams", int.class);
@@ -505,7 +511,7 @@ public final class CameraCharacteristics extends CameraMetadata {
      * to do this query each of android.request.availableRequestKeys,
      * android.request.availableResultKeys,
      * android.request.availableCharacteristicsKeys.</p>
-     * <p>XX: Maybe these should go into android.info.supportedHardwareLevel
+     * <p>XX: Maybe these should go into {@link CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL android.info.supportedHardwareLevel}
      * as a table instead?</p>
      * <p>The following capabilities are guaranteed to be available on
      * {@link CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL android.info.supportedHardwareLevel} <code>==</code> FULL devices:</p>
@@ -665,7 +671,7 @@ public final class CameraCharacteristics extends CameraMetadata {
      * <p>The mapping of image formats that are supported by this
      * camera device for input streams, to their corresponding output formats.</p>
      * <p>All camera devices with at least 1
-     * android.request.request.maxNumInputStreams will have at least one
+     * {@link CameraCharacteristics#REQUEST_MAX_NUM_INPUT_STREAMS android.request.maxNumInputStreams} will have at least one
      * available input format.</p>
      * <p>The camera device will support the following map of formats,
      * if its dependent capability is supported:</p>
@@ -712,6 +718,7 @@ public final class CameraCharacteristics extends CameraMetadata {
      * listed as available in this map is not valid.</p>
      * <p>TODO: Add java type mapping for this property.</p>
      *
+     * @see CameraCharacteristics#REQUEST_MAX_NUM_INPUT_STREAMS
      * @see CameraCharacteristics#SCALER_AVAILABLE_STALL_DURATIONS
      */
     public static final Key<int[]> SCALER_AVAILABLE_INPUT_OUTPUT_FORMATS_MAP =
@@ -885,11 +892,12 @@ public final class CameraCharacteristics extends CameraMetadata {
      * <li>IMPLEMENTATION_DEFINED</li>
      * </ul>
      * <p>All other formats may or may not have an allowed stall duration on
-     * a per-capability basis; refer to android.request.availableCapabilities
+     * a per-capability basis; refer to {@link CameraCharacteristics#REQUEST_AVAILABLE_CAPABILITIES android.request.availableCapabilities}
      * for more details.</p>
      * <p>See {@link CaptureRequest#SENSOR_FRAME_DURATION android.sensor.frameDuration} for more information about
      * calculating the max frame rate (absent stalls).</p>
      *
+     * @see CameraCharacteristics#REQUEST_AVAILABLE_CAPABILITIES
      * @see CaptureRequest#SENSOR_FRAME_DURATION
      */
     public static final Key<long[]> SCALER_AVAILABLE_STALL_DURATIONS =
@@ -922,7 +930,7 @@ public final class CameraCharacteristics extends CameraMetadata {
     /**
      * <p>Maximum possible frame duration (minimum frame
      * rate).</p>
-     * <p>The largest possible android.sensor.frameDuration
+     * <p>The largest possible {@link CaptureRequest#SENSOR_FRAME_DURATION android.sensor.frameDuration}
      * that will be accepted by the camera device. Attempting to use
      * frame durations beyond the maximum will result in the frame duration
      * being clipped to the maximum. See that control
@@ -935,6 +943,7 @@ public final class CameraCharacteristics extends CameraMetadata {
      *
      * @see CameraCharacteristics#SCALER_AVAILABLE_JPEG_MIN_DURATIONS
      * @see CameraCharacteristics#SCALER_AVAILABLE_PROCESSED_MIN_DURATIONS
+     * @see CaptureRequest#SENSOR_FRAME_DURATION
      */
     public static final Key<Long> SENSOR_INFO_MAX_FRAME_DURATION =
             new Key<Long>("android.sensor.info.maxFrameDuration", long.class);
@@ -952,7 +961,9 @@ public final class CameraCharacteristics extends CameraMetadata {
      * including black calibration pixels.</p>
      * <p>Maximum output resolution for raw format must
      * match this in
-     * android.scaler.info.availableSizesPerFormat.</p>
+     * {@link CameraCharacteristics#SCALER_AVAILABLE_STREAM_CONFIGURATIONS android.scaler.availableStreamConfigurations}.</p>
+     *
+     * @see CameraCharacteristics#SCALER_AVAILABLE_STREAM_CONFIGURATIONS
      */
     public static final Key<android.hardware.camera2.Size> SENSOR_INFO_PIXEL_ARRAY_SIZE =
             new Key<android.hardware.camera2.Size>("android.sensor.info.pixelArraySize", android.hardware.camera2.Size.class);
@@ -1026,8 +1037,10 @@ public final class CameraCharacteristics extends CameraMetadata {
 
     /**
      * <p>Optional. Defaults to [OFF]. Lists the supported test
-     * pattern modes for android.test.patternMode.</p>
+     * pattern modes for {@link CaptureRequest#SENSOR_TEST_PATTERN_MODE android.sensor.testPatternMode}.</p>
      * <p><b>Optional</b> - This value may be {@code null} on some devices.</p>
+     *
+     * @see CaptureRequest#SENSOR_TEST_PATTERN_MODE
      */
     public static final Key<Byte> SENSOR_AVAILABLE_TEST_PATTERN_MODES =
             new Key<Byte>("android.sensor.availableTestPatternModes", byte.class);
diff --git a/core/java/android/hardware/camera2/CameraMetadata.java b/core/java/android/hardware/camera2/CameraMetadata.java
index 1ce91f64b135e..a5819825810f9 100644
--- a/core/java/android/hardware/camera2/CameraMetadata.java
+++ b/core/java/android/hardware/camera2/CameraMetadata.java
@@ -400,10 +400,12 @@ public abstract class CameraMetadata {
      * formats.</li>
      * <li>The maximum available resolution for RAW16 streams (both
      * input/output) will match the value in
-     * android.sensor.info.pixelArraySize.</li>
+     * {@link CameraCharacteristics#SENSOR_INFO_PIXEL_ARRAY_SIZE android.sensor.info.pixelArraySize}.</li>
      * <li>All DNG-related optional metadata entries are provided
      * by the camera device.</li>
      * </ul>
+     *
+     * @see CameraCharacteristics#SENSOR_INFO_PIXEL_ARRAY_SIZE
      * @see CameraCharacteristics#REQUEST_AVAILABLE_CAPABILITIES
      */
     public static final int REQUEST_AVAILABLE_CAPABILITIES_DNG = 5;
@@ -783,10 +785,11 @@ public abstract class CameraMetadata {
 
     /**
      * <p>The camera device's auto white balance routine is active;
-     * the application's values for android.colorCorrection.transform
+     * the application's values for {@link CaptureRequest#COLOR_CORRECTION_TRANSFORM android.colorCorrection.transform}
      * and {@link CaptureRequest#COLOR_CORRECTION_GAINS android.colorCorrection.gains} are ignored.</p>
      *
      * @see CaptureRequest#COLOR_CORRECTION_GAINS
+     * @see CaptureRequest#COLOR_CORRECTION_TRANSFORM
      * @see CaptureRequest#CONTROL_AWB_MODE
      */
     public static final int CONTROL_AWB_MODE_AUTO = 1;
@@ -1031,10 +1034,11 @@ public abstract class CameraMetadata {
      * this should still operate correctly (but will not return
      * face detection statistics to the framework).</p>
      * <p>Unlike the other scene modes, {@link CaptureRequest#CONTROL_AE_MODE android.control.aeMode},
-     * {@link CaptureRequest#CONTROL_AWB_MODE android.control.awbMode}, and android.control.afMode
+     * {@link CaptureRequest#CONTROL_AWB_MODE android.control.awbMode}, and {@link CaptureRequest#CONTROL_AF_MODE android.control.afMode}
      * remain active when FACE_PRIORITY is set.</p>
      *
      * @see CaptureRequest#CONTROL_AE_MODE
+     * @see CaptureRequest#CONTROL_AF_MODE
      * @see CaptureRequest#CONTROL_AWB_MODE
      * @see CaptureRequest#STATISTICS_FACE_DETECT_MODE
      * @see CaptureRequest#CONTROL_SCENE_MODE
@@ -1429,7 +1433,7 @@ public abstract class CameraMetadata {
 
     /**
      * <p>Use the tone mapping curve specified in
-     * android.tonemap.curve.</p>
+     * the android.tonemap.curve* entries.</p>
      * <p>All color enhancement and tonemapping must be disabled, except
      * for applying the tonemapping curve specified by
      * {@link CaptureRequest#TONEMAP_CURVE_RED android.tonemap.curveRed}, {@link CaptureRequest#TONEMAP_CURVE_BLUE android.tonemap.curveBlue}, or
@@ -1642,21 +1646,25 @@ public abstract class CameraMetadata {
     //
 
     /**
-     * <p>The lens parameters ({@link CaptureRequest#LENS_FOCAL_LENGTH android.lens.focalLength}, android.lens.focusDistance
-     * android.lens.filterDensity and {@link CaptureRequest#LENS_APERTURE android.lens.aperture}) are not changing.</p>
+     * <p>The lens parameters ({@link CaptureRequest#LENS_FOCAL_LENGTH android.lens.focalLength}, {@link CaptureRequest#LENS_FOCUS_DISTANCE android.lens.focusDistance},
+     * {@link CaptureRequest#LENS_FILTER_DENSITY android.lens.filterDensity} and {@link CaptureRequest#LENS_APERTURE android.lens.aperture}) are not changing.</p>
      *
      * @see CaptureRequest#LENS_APERTURE
+     * @see CaptureRequest#LENS_FILTER_DENSITY
      * @see CaptureRequest#LENS_FOCAL_LENGTH
+     * @see CaptureRequest#LENS_FOCUS_DISTANCE
      * @see CaptureResult#LENS_STATE
      */
     public static final int LENS_STATE_STATIONARY = 0;
 
     /**
-     * <p>Any of the lens parameters ({@link CaptureRequest#LENS_FOCAL_LENGTH android.lens.focalLength}, android.lens.focusDistance
-     * android.lens.filterDensity or {@link CaptureRequest#LENS_APERTURE android.lens.aperture}) is changing.</p>
+     * <p>Any of the lens parameters ({@link CaptureRequest#LENS_FOCAL_LENGTH android.lens.focalLength}, {@link CaptureRequest#LENS_FOCUS_DISTANCE android.lens.focusDistance},
+     * {@link CaptureRequest#LENS_FILTER_DENSITY android.lens.filterDensity} or {@link CaptureRequest#LENS_APERTURE android.lens.aperture}) is changing.</p>
      *
      * @see CaptureRequest#LENS_APERTURE
+     * @see CaptureRequest#LENS_FILTER_DENSITY
      * @see CaptureRequest#LENS_FOCAL_LENGTH
+     * @see CaptureRequest#LENS_FOCUS_DISTANCE
      * @see CaptureResult#LENS_STATE
      */
     public static final int LENS_STATE_MOVING = 1;
diff --git a/core/java/android/hardware/camera2/CaptureRequest.java b/core/java/android/hardware/camera2/CaptureRequest.java
index 326205edc22d1..408e53206368c 100644
--- a/core/java/android/hardware/camera2/CaptureRequest.java
+++ b/core/java/android/hardware/camera2/CaptureRequest.java
@@ -472,7 +472,7 @@ public final class CaptureRequest extends CameraMetadata implements Parcelable {
      * <p>If AE precapture is triggered (see {@link CaptureRequest#CONTROL_AE_PRECAPTURE_TRIGGER android.control.aePrecaptureTrigger})
      * when AE is already locked, the camera device will not change the exposure time
      * ({@link CaptureRequest#SENSOR_EXPOSURE_TIME android.sensor.exposureTime}) and sensitivity ({@link CaptureRequest#SENSOR_SENSITIVITY android.sensor.sensitivity})
-     * parameters. The flash may be fired if the android.control.aeMode
+     * parameters. The flash may be fired if the {@link CaptureRequest#CONTROL_AE_MODE android.control.aeMode}
      * is ON_AUTO_FLASH/ON_AUTO_FLASH_REDEYE and the scene is too dark. If the
      * {@link CaptureRequest#CONTROL_AE_MODE android.control.aeMode} is ON_ALWAYS_FLASH, the scene may become overexposed.</p>
      * <p>See {@link CaptureResult#CONTROL_AE_STATE android.control.aeState} for AE lock related state transition details.</p>
@@ -581,9 +581,10 @@ public final class CaptureRequest extends CameraMetadata implements Parcelable {
      * mode it is set to</p>
      * <p>Only effective if {@link CaptureRequest#CONTROL_MODE android.control.mode} = AUTO.</p>
      * <p>If the lens is controlled by the camera device auto-focus algorithm,
-     * the camera device will report the current AF status in android.control.afState
+     * the camera device will report the current AF status in {@link CaptureResult#CONTROL_AF_STATE android.control.afState}
      * in result metadata.</p>
      *
+     * @see CaptureResult#CONTROL_AF_STATE
      * @see CaptureRequest#CONTROL_MODE
      * @see #CONTROL_AF_MODE_OFF
      * @see #CONTROL_AF_MODE_AUTO
@@ -658,7 +659,7 @@ public final class CaptureRequest extends CameraMetadata implements Parcelable {
      * {@link CaptureRequest#COLOR_CORRECTION_MODE android.colorCorrection.mode}.</p>
      * <p>When set to the OFF mode, the camera device's auto white balance
      * routine is disabled. The applicantion manually controls the white
-     * balance by {@link CaptureRequest#COLOR_CORRECTION_TRANSFORM android.colorCorrection.transform}, android.colorCorrection.gains
+     * balance by {@link CaptureRequest#COLOR_CORRECTION_TRANSFORM android.colorCorrection.transform}, {@link CaptureRequest#COLOR_CORRECTION_GAINS android.colorCorrection.gains}
      * and {@link CaptureRequest#COLOR_CORRECTION_MODE android.colorCorrection.mode}.</p>
      * <p>When set to any other modes, the camera device's auto white balance
      * routine is disabled. The camera device uses each particular illumination
@@ -944,7 +945,7 @@ public final class CaptureRequest extends CameraMetadata implements Parcelable {
      * one of the values listed in {@link CameraCharacteristics#LENS_INFO_AVAILABLE_APERTURES android.lens.info.availableApertures}.</p>
      * <p>When this is supported and {@link CaptureRequest#CONTROL_AE_MODE android.control.aeMode} is OFF,
      * this can be set along with {@link CaptureRequest#SENSOR_EXPOSURE_TIME android.sensor.exposureTime},
-     * {@link CaptureRequest#SENSOR_SENSITIVITY android.sensor.sensitivity}, and android.sensor.frameDuration
+     * {@link CaptureRequest#SENSOR_SENSITIVITY android.sensor.sensitivity}, and {@link CaptureRequest#SENSOR_FRAME_DURATION android.sensor.frameDuration}
      * to achieve manual exposure control.</p>
      * <p>The requested aperture value may take several frames to reach the
      * requested value; the camera device will report the current (intermediate)
@@ -959,6 +960,7 @@ public final class CaptureRequest extends CameraMetadata implements Parcelable {
      * @see CameraCharacteristics#LENS_INFO_AVAILABLE_APERTURES
      * @see CaptureResult#LENS_STATE
      * @see CaptureRequest#SENSOR_EXPOSURE_TIME
+     * @see CaptureRequest#SENSOR_FRAME_DURATION
      * @see CaptureRequest#SENSOR_SENSITIVITY
      */
     public static final Key<Float> LENS_APERTURE =
@@ -1091,9 +1093,11 @@ public final class CaptureRequest extends CameraMetadata implements Parcelable {
      * for raw output, where only a few fixed scales may be
      * possible. The width and height of the crop region cannot
      * be set to be smaller than floor( activeArraySize.width /
-     * android.scaler.maxDigitalZoom ) and floor(
-     * activeArraySize.height / android.scaler.maxDigitalZoom),
-     * respectively.</p>
+     * {@link CameraCharacteristics#SCALER_AVAILABLE_MAX_DIGITAL_ZOOM android.scaler.availableMaxDigitalZoom} ) and floor(
+     * activeArraySize.height /
+     * {@link CameraCharacteristics#SCALER_AVAILABLE_MAX_DIGITAL_ZOOM android.scaler.availableMaxDigitalZoom}), respectively.</p>
+     *
+     * @see CameraCharacteristics#SCALER_AVAILABLE_MAX_DIGITAL_ZOOM
      */
     public static final Key<android.graphics.Rect> SCALER_CROP_REGION =
             new Key<android.graphics.Rect>("android.scaler.cropRegion", android.graphics.Rect.class);
diff --git a/core/java/android/hardware/camera2/CaptureResult.java b/core/java/android/hardware/camera2/CaptureResult.java
index f556d71aedcff..345b52c09b365 100644
--- a/core/java/android/hardware/camera2/CaptureResult.java
+++ b/core/java/android/hardware/camera2/CaptureResult.java
@@ -391,9 +391,10 @@ public final class CaptureResult extends CameraMetadata {
      * mode it is set to</p>
      * <p>Only effective if {@link CaptureRequest#CONTROL_MODE android.control.mode} = AUTO.</p>
      * <p>If the lens is controlled by the camera device auto-focus algorithm,
-     * the camera device will report the current AF status in android.control.afState
+     * the camera device will report the current AF status in {@link CaptureResult#CONTROL_AF_STATE android.control.afState}
      * in result metadata.</p>
      *
+     * @see CaptureResult#CONTROL_AF_STATE
      * @see CaptureRequest#CONTROL_MODE
      * @see #CONTROL_AF_MODE_OFF
      * @see #CONTROL_AF_MODE_AUTO
@@ -771,7 +772,7 @@ public final class CaptureResult extends CameraMetadata {
      * {@link CaptureRequest#COLOR_CORRECTION_MODE android.colorCorrection.mode}.</p>
      * <p>When set to the OFF mode, the camera device's auto white balance
      * routine is disabled. The applicantion manually controls the white
-     * balance by {@link CaptureRequest#COLOR_CORRECTION_TRANSFORM android.colorCorrection.transform}, android.colorCorrection.gains
+     * balance by {@link CaptureRequest#COLOR_CORRECTION_TRANSFORM android.colorCorrection.transform}, {@link CaptureRequest#COLOR_CORRECTION_GAINS android.colorCorrection.gains}
      * and {@link CaptureRequest#COLOR_CORRECTION_MODE android.colorCorrection.mode}.</p>
      * <p>When set to any other modes, the camera device's auto white balance
      * routine is disabled. The camera device uses each particular illumination
@@ -1019,8 +1020,9 @@ public final class CaptureResult extends CameraMetadata {
      * of the pixel array, and the width,height of the pixel array given in
      * {@link CameraCharacteristics#SENSOR_INFO_PIXEL_ARRAY_SIZE android.sensor.info.pixelArraySize}.  This may include hot pixels
      * that lie outside of the active array bounds given by
-     * android.sensor.activeArraySize.</p>
+     * {@link CameraCharacteristics#SENSOR_INFO_ACTIVE_ARRAY_SIZE android.sensor.info.activeArraySize}.</p>
      *
+     * @see CameraCharacteristics#SENSOR_INFO_ACTIVE_ARRAY_SIZE
      * @see CameraCharacteristics#SENSOR_INFO_PIXEL_ARRAY_SIZE
      */
     public static final Key<int[]> HOT_PIXEL_MAP =
@@ -1099,7 +1101,7 @@ public final class CaptureResult extends CameraMetadata {
      * one of the values listed in {@link CameraCharacteristics#LENS_INFO_AVAILABLE_APERTURES android.lens.info.availableApertures}.</p>
      * <p>When this is supported and {@link CaptureRequest#CONTROL_AE_MODE android.control.aeMode} is OFF,
      * this can be set along with {@link CaptureRequest#SENSOR_EXPOSURE_TIME android.sensor.exposureTime},
-     * {@link CaptureRequest#SENSOR_SENSITIVITY android.sensor.sensitivity}, and android.sensor.frameDuration
+     * {@link CaptureRequest#SENSOR_SENSITIVITY android.sensor.sensitivity}, and {@link CaptureRequest#SENSOR_FRAME_DURATION android.sensor.frameDuration}
      * to achieve manual exposure control.</p>
      * <p>The requested aperture value may take several frames to reach the
      * requested value; the camera device will report the current (intermediate)
@@ -1114,6 +1116,7 @@ public final class CaptureResult extends CameraMetadata {
      * @see CameraCharacteristics#LENS_INFO_AVAILABLE_APERTURES
      * @see CaptureResult#LENS_STATE
      * @see CaptureRequest#SENSOR_EXPOSURE_TIME
+     * @see CaptureRequest#SENSOR_FRAME_DURATION
      * @see CaptureRequest#SENSOR_SENSITIVITY
      */
     public static final Key<Float> LENS_APERTURE =
@@ -1325,9 +1328,11 @@ public final class CaptureResult extends CameraMetadata {
      * for raw output, where only a few fixed scales may be
      * possible. The width and height of the crop region cannot
      * be set to be smaller than floor( activeArraySize.width /
-     * android.scaler.maxDigitalZoom ) and floor(
-     * activeArraySize.height / android.scaler.maxDigitalZoom),
-     * respectively.</p>
+     * {@link CameraCharacteristics#SCALER_AVAILABLE_MAX_DIGITAL_ZOOM android.scaler.availableMaxDigitalZoom} ) and floor(
+     * activeArraySize.height /
+     * {@link CameraCharacteristics#SCALER_AVAILABLE_MAX_DIGITAL_ZOOM android.scaler.availableMaxDigitalZoom}), respectively.</p>
+     *
+     * @see CameraCharacteristics#SCALER_AVAILABLE_MAX_DIGITAL_ZOOM
      */
     public static final Key<android.graphics.Rect> SCALER_CROP_REGION =
             new Key<android.graphics.Rect>("android.scaler.cropRegion", android.graphics.Rect.class);
@@ -1738,7 +1743,7 @@ public final class CaptureResult extends CameraMetadata {
      * (<code>{@link CaptureRequest#CONTROL_AE_MODE android.control.aeMode} == OFF</code> or <code>{@link CaptureRequest#CONTROL_MODE android.control.mode} == OFF</code>),
      * the {@link CaptureRequest#CONTROL_AE_ANTIBANDING_MODE android.control.aeAntibandingMode} doesn't do the antibanding, and the
      * application can ensure it selects exposure times that do not cause banding
-     * issues by looking into this metadata field. See android.control.aeAntibandingMode
+     * issues by looking into this metadata field. See {@link CaptureRequest#CONTROL_AE_ANTIBANDING_MODE android.control.aeAntibandingMode}
      * for more details.</p>
      * <p>Report NONE if there doesn't appear to be flickering illumination.</p>
      *