Topaz used to be very strong when it came to noise reduction, but Lightroom has clearly surpassed it by a wide margin. Today, DxO and Lightroom are the technological leaders in this field: sometimes DxO delivers a few percent better results, sometimes Lightroom does. I no longer use Topaz for noise reduction at all, because it has fallen behind in every respect and hasn’t developed nearly as well as its competitors.
The key reason why I now do all my noise reduction exclusively in Lightroom is the workflow: Lightroom works completely non-destructively. I can adjust or undo every change at any time. If I later decide that I want a bit more or a bit less noise reduction – or even want to disable it entirely – Lightroom makes that possible without any limitations.
If I were to denoise my RAW files in an external application beforehand, the result would be baked into a TIFF. That means leaving the RAW level entirely. The file becomes larger, less flexible, and all previous processing steps are permanently embedded. With Lightroom’s internal tools, however, I stay fully on the RAW level – nothing is permanently baked in.
Here’s an example:
You denoise an image in DxO because it happens to perform maybe 5% better on that specific photo. Later, you realize the noise reduction was actually a bit too strong. In Lightroom, I would simply move the slider and fix it. But with a TIFF generated externally, that’s no longer possible because the changes are irreversibly written into the file. The moment you leave the RAW layer, the limitations start piling up.
Or you end up with a TIFF where parts of the processing are already irreversibly embedded – and just 30 minutes later in your editing workflow you realize it was too much. That will never happen to me in Lightroom: I can adjust any parameter at any time, and the final image will be perfectly tuned.
This is why slightly better noise-reduction results are completely irrelevant if they come at the cost of flexibility. A small advantage in the beginning becomes a major disadvantage later.
I am deliberately saying TIFF here, because even though some tools and plugins can output DNG, the file has already been demosaiced – it’s no longer a true RAW file.
This is why I keep everything inside Lightroom. Since its AI noise reduction has become nearly state-of-the-art, there is no reason to leave Lightroom for this task. The disadvantages and limitations of external software are simply too great – not to mention the hassle of managing additional files.
And when editing, I also love using Lightroom’s virtual copies – a brilliant feature for flexible workflows.