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If you shoot a Holy Grail Sequence right towards the sun, you will get blown highlights, no matter what you do. The sun is just too bright.
If you then change the shutter-time to compensate for the fact that it get's darker (or brighter on sunrise), you will increase (or decrease) the extent of the blown highlights as well. After leveling the sequence you might thus notice a "pumping" effect in the rendered video.
There are several approaches to reduce respectively eliminate this effect.
If you then change the shutter-time to compensate for the fact that it get's darker (or brighter on sunrise), you will increase (or decrease) the extent of the blown highlights as well. After leveling the sequence you might thus notice a "pumping" effect in the rendered video.
There are several approaches to reduce respectively eliminate this effect.
- When setting exposure, check the histogram. Make sure it is not clipped on the right side. This means to underexpose more.
- Make smaller steps: Instead of changing the camera values by one EV or more, change in smaller steps of 2/3 EV or even 1/3 EV. DslrDashboard and its Auto Holy Grail Feature can tremendously help with this.
- When editing the keyframes, pull down the Highlights in Lightroom to ease the clipping
- When rendering use "LRT Motion Blur Plus" to further smooth the transitions.