Author Topic: dubcats secret little hideout  (Read 92969 times)

2017-05-03, 19:36:27
Reply #60

Fluss

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Angle Affect
This feature should be included in Corona if you ask me! I notice this effect each time I lay down, even on rough fabrics.
Next time you lie down in bed or drunk on the floor, try to look for this effect, and then go and +1 mantis!



This is a very important request. Almost all materials I do I input falloff to the ref glossiness map to mimic this behaviour. I think this could be default behaviour - I think 90% of materials work this way (visually). So +1 from me.

Well, Ondra almost promised it a long time ago. "AFAIK this is part of disney BRDF model, so it will be almost certainly included in Corona PBR mtl" -> https://corona-renderer.com/forum/index.php?topic=12621.0

2017-05-06, 06:45:10
Reply #61

worx

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Update:

I got it working and quite like the results

The 01b is the version with the luts and 210w 34b sRGB

Which lut was used for this? Also was it applied in max corona or in PS?
I have been trying to achieve the same gradient like fall off in corners for soo long now and i just cant. Default interiors just look so flat and i resort to blending AO in ps, but its just not the same.

Would you mind talking about how that was achieved? Any clues would be great!

2017-09-30, 03:04:48
Reply #62

dubcat

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These radius settings are at 1k, multiply K by whatever you are using.
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2017-09-30, 19:28:49
Reply #63

PROH

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Hi dubcat. I am trying to rebuild some old corona materials with the new BPR settings, and wanted to use your IOR excel shead, but I cant get permission to download it. So would it be possible to get you to make a new/different link to this (for example Dropbox)?

Best regards.

2017-10-02, 21:44:24
Reply #64

dubcat

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wanted to use your IOR excel shead

Hey!
Some folders on my google drive got messed up, I need to dig through the backup log and make new links.

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I finally got around to make a real time high pass filter + albedo changer.
I've been using this technique for years in Photoshop, but now I can adjust everything live in IR!

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2017-10-03, 03:08:44
Reply #65

snakebox

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These radius settings are at 1k, multiply K by whatever you are using.

How on earth did you come up with these numbers?  just feels good or is there some science to it? (like most of the stuff you do :) )  interesting approach for sure, keep it up!

2017-10-03, 08:07:24
Reply #66

dubcat

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How on earth did you come up with these numbers?
They try to emulate the typical setting that Scandinavian interior photographers use in Lightroom. Lightroom still looks better, but it's nice to have a little preview in VFB while working.

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I''v uploaded a new spreadsheet.
It has two tabs "Reflectivity and IOR" and "Size to Real World Size"
I added Unreal 4 conversion to the sheet earlier this year.



https://docs.google.com/spreadsheets/d/1jdENLgrX7r85zhumLMpzreNf11tmFuBhv3UXiEMgG1E/
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2017-10-03, 12:56:50
Reply #67

PROH

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Thank you so much :)

2017-10-03, 13:34:20
Reply #68

johnymrazko

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These radius settings are at 1k, multiply K by whatever you are using.

should only blur and sharpen radius be multiplied by k? or amount as well?

2017-10-03, 14:43:36
Reply #69

dubcat

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should only blur and sharpen radius be multiplied by k? or amount as well?

Only radius.
It's hard to tell if the radius parameters scale linearly, since we can't just scale the renders down and compare.
Sharpen in Corona is really harsh, even 0.001 sharpen radius crush blacks.

-----------------------------------

For people who tried to make a copy of the spreadsheet when I first uploaded it, try again now. The function was disabled for whatever reason.
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2017-10-03, 19:58:56
Reply #70

johnymrazko

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Thank you,

do you also know what would be the equivalent values in Lightroom?

2017-10-03, 20:41:04
Reply #71

dubcat

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These are the average values

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2017-10-06, 10:54:18
Reply #72

Fluss

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I find it strange to use LUT that is not related to the digital depth of the image rendered ?!
Maybe I'll release 64 sliced versions in the future, 41+ should be enough for what you want.

What cameras are used for the extracted LUT ?
I went into my Canon/Nikon folders and selected 3 random LUTs. I got a lot of Canon 60D LUTs in there, so one of them might be 60D.

Canon cameras have this magenta Tint to them, sometimes -10 green. This happens even if you calibrate the camera as perfect as you can. We need to use the sexy Tint feature in CameraRAW to get a perfect white balance. Since I'm dumping the real deal, I left this error in there. If you notice a slight magenta shift, it's a Canon LUT 99%.

Canons best friend.



and a big thanks to everyone else that has responded!

If you are a canon user, you should try magiclantern. It's a custom firmware that extends camera capabilities. There is a withe balance function that can actually correct the magenta shift.

Edit: http://www.magiclantern.fm/

2017-10-06, 23:18:38
Reply #73

lmikkelb

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Just one question, to clarify. We are viewing srgb and applying luts thats based on srgb right? good job with the luts and everything by the way, that corona mask thing looks amazing.
« Last Edit: 2017-10-07, 12:27:55 by lmikkelb »

2017-10-10, 13:05:05
Reply #74

dubcat

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srgb right?

Yes, viewed as sRGB :)
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