1. Shooting for HDR:
* Bracketed Exposures: The foundation of any good HDR image is shooting a series of bracketed exposures. This means taking multiple photos of the same scene with different exposure settings (typically -2, -1, 0, +1, +2 stops).
* Tripod: A sturdy tripod is essential to keep your camera perfectly still between exposures. This avoids ghosting and alignment issues during processing.
* Low ISO: Use the lowest ISO setting your camera allows to minimize noise.
* RAW Format: Shooting in RAW format captures the most information, giving you greater flexibility during processing.
* Avoid Moving Objects: HDR is best suited for static scenes. If there are moving objects (people, cars, clouds), they can cause ghosting. Aurora HDR 2018 has ghost reduction tools, but it's still best to minimize movement.
* Compose Carefully: Remember that HDR can emphasize details. Ensure your composition is strong and avoid distracting elements.
2. Loading and Merging in Aurora HDR 2018:
* Open Bracketed Images: Launch Aurora HDR 2018 and click "Open Images." Select your bracketed exposures.
* Merge Options:
* Ghost Reduction: Aurora will automatically detect and attempt to reduce ghosting. Experiment with the "Ghost Reduction" slider to find the optimal setting. Too much can soften the image.
* Chromatic Aberration Reduction: Enable this option to minimize color fringing around high-contrast edges.
* Alignment: Aurora will automatically align the images, but double-check the results, especially if you shot handheld.
* Denoise: Enable "Denoise" to reduce noise in the merged image. Don't overdo it, as it can reduce detail.
* Click "Create HDR": This initiates the merging process.
3. The Key to Natural-Looking HDR: Subtlety is Key
* Start with a Preset (But Don't Stop There): Aurora HDR 2018 comes with many presets. Browse through them to find one that's a good starting point for your image. However, don't rely solely on presets. They are often too strong. Think of them as a base layer. Good preset categories to start with are "Natural," "Realistic," or "Landscape."
* Use the Layers: Aurora HDR uses layers similarly to Photoshop. This allows you to apply different adjustments to different parts of the image. You can create a new layer and then selectively brush on effects or use adjustment masks.
* Global Adjustments: Focus on the following global adjustments for a natural look:
* HDR Look (Signature Adjustment): This is a crucial slider. Use it sparingly. A value of 10-30% is often enough for a natural effect.
* Exposure: Adjust the overall brightness of the image.
* Contrast: Increase contrast slightly to add definition, but be careful not to overdo it.
* Highlights & Shadows: These are your main tools for recovering detail in bright and dark areas. Reduce highlights and increase shadows to reveal more information.
* Whites & Blacks: Adjust these to fine-tune the dynamic range and prevent clipping (loss of detail in highlights or shadows). Use the histogram as a guide.
* Color Temperature & Tint: Adjust the white balance to achieve accurate or pleasing colors. A slight adjustment can make a big difference.
* Saturation & Vibrance: Increase vibrance (affects less saturated colors more) to add color without making the image look artificial. Use saturation sparingly.
* Details: Sharpen the image carefully. Too much sharpening can introduce artifacts and noise. Use the "Details" panel, which allows you to control sharpening and noise reduction separately for highlights, shadows, and midtones.
* Local Adjustments (Crucial for Natural HDR): This is where you can really refine your image.
* Adjustment Brush: This allows you to paint adjustments onto specific areas of the image. For example, you might use it to selectively brighten a dark foreground or darken an overly bright sky.
* Gradient Filter: Use this to apply adjustments gradually across a linear area of the image. It's perfect for darkening skies or adjusting the color of the ground.
* Radial Filter: Apply adjustments within or outside of a circular or elliptical area. Great for focusing attention on a subject.
* Luminosity Masking (Advanced): Selectively adjust only certain brightness ranges in the image. This allows you to refine highlights, shadows, or midtones without affecting other areas.
4. Specific Adjustment Tips for Natural-Looking Results:
* Avoid Over-Saturation: Overly saturated colors are a hallmark of bad HDR. Keep colors realistic and natural.
* Don't Push the HDR Look Slider Too Far: This is the single most important factor in achieving a natural look. Less is more.
* Gentle Contrast Adjustments: Extreme contrast can make an image look harsh and unrealistic.
* Pay Attention to Detail: Look for artifacts, halos, and other signs of over-processing. Zoom in to 100% to check detail.
* Blacks and Whites: Make sure your blacks aren't crushed (completely black with no detail) and your whites aren't clipped (completely white with no detail). A histogram is your friend.
* Subtle Dodging and Burning: Use the adjustment brush to selectively lighten (dodge) or darken (burn) areas to subtly guide the viewer's eye.
5. Final Touches:
* Noise Reduction: Apply a final touch of noise reduction if needed, especially if you shot at a higher ISO.
* Sharpening: Sharpen the image as the very last step, being careful not to over-sharpen.
* Export: Choose the appropriate export settings for your intended use (e.g., JPEG for web, TIFF for printing).
In summary, the key to natural-looking HDR images in Aurora HDR 2018 is to be subtle, use layers and local adjustments to refine the image, and avoid pushing any single slider too far. Start with a good set of bracketed exposures and focus on bringing out the details and dynamic range of the scene in a realistic way.