User Manual

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To use the highlight exposure to selectively put detail back into the image (for example,
to retrieve blown-out windows), use a Power Window, HSL Qualification, or a
combination of the two to isolate the region you want to retrieve in Node 3. (Be careful
if you’re using HSL Qualification to combine both exposures, as keyed edges can be
tricky to blend.)
Isolating a region of the image to replace using
the highlight exposure image of a RED HDRx clip
Final node display with isolations
A Note About RED HDRx Media and Performance
Since RED HDRx media records two complete streams of image data, DaVinci Resolve
must simultaneously decode two separate tracks whenever you add a second Source
input. (If you don’t add the second Source input, only the first stream is decoded.)
Because of this, whether you’re relying on your computer’s CPU or GPU to decode RED
media, you’ll get half the performance when using the highlight stream of an HDR clip.
To improve performance, you can enable the Smart Cache by choosing Playback >
Render Cache > Smart (or by pressing the CACHE MODE button on the T-bar panel of
your DaVinci Resolve control panel repeatedly until you toggle to User mode). This
automatically caches all raw source clips to the current codec set in the Render Cache
Format parameter of the Master Settings panel of the Project Settings. Alternatively,
you can enable the User Cache, and cache all HDRx clips manually by right-clicking
them and choosing Render Cache Fusion Output > On (or by pressing the CACHE
MODE button of your DaVinci Resolve control panel). DaVinci Resolve renders all
cached clips while you’re paused, so the next time you play a cached clip, it will play at
full speed.
If you regularly use RED HDRx media, multiple high-end GPU cards are recommended
for optimal decoding performance.
Chapter – 127 Channel Splitting and Image Compositing 2885