Started by WAS, June 01, 2018, 03:21:13 pm
Quote from: Oshyan on June 01, 2018, 09:11:18 pmCan you point to the desired effect in an example image?
Quote from: pokoy on June 04, 2018, 07:52:44 amI don't want to add unnecessary noise to the discussion but since I'm working a lot with real life photography and need TG to produce matching skies/atmospheres I found TG to be pretty realistic out of the box. As Oshyan states, the Ozone parameter has added the last bit of realism, at least for me.I guess what's missing in the discussion is that converting Wide RGB color space (assuming TG uses a wider space than sRGB internally) to sRGB always comes at the cost of some trade-off and may change how sRGB displays colors, this is especially the case for dark blue / violet / orange / bright yellow tones, blue doesn't seem to be affected much.Another aspect is that cameras will never work at a neutral white point (6500K for TG I guess) in a natural environment, adding further changes to any image you might be comparing TG's results against. I'm all for an additional Color Temperature parameter in the Frame Buffer as this one could really help to achieve more photo-realistic results.I'll agree that achieving deep violet sunset colors with TG is a bit difficult without playing with the parameters but Ozone has helped a lot here. With a Color Temperature parameter this could become easier. But the effect is quite a rare occurrence in nature as well and needs some conditions to be met which may be hard or impossible to 'construct' with TG after all.
Quote from: Matt on June 04, 2018, 05:24:42 pmThe defaults are a little too hazy for a clear sky, but the added haze looks better once you add clouds IMO, so that influences my choice for the default. Have you tried reducing haze to somewhere between 0 and 0.25, and experimented with small changes to bluesky density (say between 1.5 and 5.0)?You could also try subtle changes to the colours, but they are quite sensitive.Matt
Quote from: Matt on June 04, 2018, 05:35:26 pmWe could probably achieve more realistic images by simulating in a different colour space. That's a bit of a side project of mine which is currently on the back burner.
Quote from: Matt on June 04, 2018, 05:35:26 pmSome of those benefits might be possible simply by increasing saturation by 10-20% in post. Maybe...
Quote from: WASasquatch on June 04, 2018, 01:19:30 pmThis again why I would like to be able to control the intensity of these decays with a slider. It would be a lot more practical than picking colours, for one, and distorting base colour hues, or spending so much time making sure you're within the same colour hue when selecting a new colour.
Quote from: WASasquatch on June 04, 2018, 01:19:30 pmThat's one of the issues I have been struggling with, when matching sunsets off what I see outside smoking a cigarette, I can't get the blue sky colour to play nice with redsky decay. It's like the bias between colours is too short, or long. Like when doing a reddish-pink sky, your bluesky will be mint or seafoam green, which than requires two atmospheres for proper simulation.I feel at this height, the sun should have more colour at it's source, and more colour on the horizon. It is way to white washed and represents no sunset I have EVER seen, watching them my whole life, or any image in the raw, or edited. Just unrealistic altogether. Sure looks nice, and having been seeing nothing but it working it it all the time, I can see how people are easily bias, or unaware of the subtle differences IRL.
Quote from: WASasquatch on June 05, 2018, 05:48:28 pmIt would be really cool to have a tone map and curve map in the filter settings. A lot can be done right in TG with those two features without post work. You can also get them to work nicely with your scene as apposed to a hard pixel manipulation in PS that often causes colour burning and ribbon-ing on gradients.