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| Unfortunately it turns out they weren’t NaNs, although I’ve definitely had that problem before. The matching article on your page suggests that NaNs are a result of bugs in the rendering software, if that’s correct then several years ago I was getting regular NaN pixels with renders from Arnold. The current project I’m on is rendered with Vray. But in this case they’re not NaNs, just super hot pixels. I’m working on a battle scene and there’s lots of weapons and metallic armour and hence reflections/specularity. Individual pixels will flicker from around the .5 mark up to 10 between frames. This makes white dots flicker around, at first it looked like a type of watermarking! (wasn’t there a plugin vendor that used random dots to watermark demo versions, instead of the traditional red cross?) While I’ve played around with 32 bit on several jobs, I’m still looking for the most comfortable AE tool to grade HDR. The issue I’ve got is that there’s plenty of nice detail in the highlights that I want to retain. There’s lots of goodness in the 1 - 3 range that I want to see, not clip. Most layers have the HDR Highlight Compression plugin applied at various percentages - so far that’s been my most successful approach. I recover the details I want through highlight compression then grade after that. I am sometimes using the levels effect just to clip the values, but only after a certain point in the comp - it’s mostly to avoid weirdness with negative values. I’m too far into the project to jump into Lumetri, but if anyone’s successfully used Lumetri to grade/tone map HDR images I’d love to know. -Chris > On 14 Sep 2018, at 2:01 am, Brendan Bolles <AE-List@media-motion.tv> wrote: > > On Sep 11, 2018, at 5:40 PM, Chris Zwar wrote: > >> Thanks, downloading now! >> Wow Brandan has totally saved my ass (and the reputation of After Effects) with the current project I’ve been working on. So many beers are owed. > > > Haha, was that it, you had NaNs? > > If they were non-NaN hot pixels, I'd suggest you clip them by applying Levels with output clipping on and then set both Input White and Output White to whatever maximum value you wanted to clip. > > But if you've got NaNs you need NaNny! > > > Brendan > > > +---End of message---+ > To unsubscribe send any message to <ae-list-off@media-motion.tv> |
