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Maxunderground news unavailable

Vray 2.40.04 don't affect colors equivalent
show user profile  3joez
Holy fronats, I've just realized that in the new Vray they left out the don't affect colors option.
Do you have an idea of what is the current equivalent?
(provided srgb button is pressed in the frame buffer)

read 4707 times
12/18/2013 6:38:23 PM (last edit: 12/18/2013 6:39:28 PM)
show user profile  BishBashRoss
Haven't used it but that bottom option looks to be the one you want. You could do a quick test with a dark scene.

read 4703 times
12/18/2013 6:41:31 PM (last edit: 12/18/2013 6:41:31 PM)
show user profile  donvella
thats a max2014 not vray. (if you have vray2 on max12 u can see this option)

the option you selected is for not affect colors (mode: color mapping only (no gamma).

I found the closest options for emulating photorealism (meaning your texture looks as close as possible to the same gamma/color in render - this is cos clients get ultra picky about the shade of color they provide you 95% of the time in archviz) are:

edit: and keep your srgb button selected in vfb

fyi, clamping is a legacy option (keep it if you like the results)

read 4674 times
12/19/2013 1:43:41 AM (last edit: 12/19/2013 1:47:38 AM)
show user profile  BishBashRoss

Seems like you're right. But on your version you want to set gamma under color mapping to 2.2 and then set the mode to color mapping only (no gamma). (we think).

The way you have it you have to over sample for dark areas. :)

read 4669 times
12/19/2013 1:49:02 AM (last edit: 12/19/2013 1:49:02 AM)
show user profile  donvella
i dont know what you mean by oversample dark areas - learn me up.

correct me if im wrong, basically having max 2.2 is for input gamma (u cant set your output to 1.0 so i use the color mapping). having mode: color mapping and gamma it applies 2.2 to your image and creates the 'dont affect colors' option which im used to aswell, which means you need to enable the srgb to display at 2.2 because the output will come out as 1.0 with the 'colors affected'.

edit: saving as exr gives you the gamma switch and comes in at 2.2 with the ability to revert back without losing color value. alternately using pngs, tifs or tga you have to apply the gamma curve in post

read 4665 times
12/19/2013 2:01:07 AM (last edit: 12/19/2013 2:02:44 AM)
show user profile  BishBashRoss
Setting vray gamma to 2.2 + don't affect colors means that the behind the scenes noise calculations are done on the gamma corrected version. Without this you may find that dark areas of your image are noisey and the only way to get rid of it is to increase your samples/noise threshold way more than necessary.

Using the SRGB button instead of baking the gamma means you can keep everything in linear space, this can be necessary for some compositing workflows.

When you are saving to png or tif or whatever you can put the 2.2 gamma correction in the save dialogue. This is preferable to doing it in post. You should be able to do it both ways and check the histogram to see the difference.

Hope that helps sorry and I understood what you were asking. Really should be in bed. :)

read 4658 times
12/19/2013 2:19:27 AM (last edit: 12/19/2013 2:19:27 AM)
show user profile  donvella
Its morning for me, but I will check out what your saying when I get home - as Im doing a dark scene and would benefit from this knowledge :P Although noise is something I dont usually encounter ;) Even on highres I usually leave my noise thresh at default 0.01

edit: I find setting the color threshold at .005 will remove almost all noise

read 4655 times
12/19/2013 2:20:55 AM (last edit: 12/19/2013 2:24:08 AM)
show user profile  3joez
Yes, it's an old story and basically Ross described it correctly. I just want to oversample dark areas.
let me look around some more, do the tests and then come back.
read 4640 times
12/19/2013 7:35:26 AM (last edit: 12/19/2013 7:35:26 AM)
show user profile  3joez
Looks like Ross was right. According to this, now linear workflow is set by default

read 4637 times
12/19/2013 9:59:00 AM (last edit: 12/19/2013 9:59:00 AM)
show user profile  donvella
wierd, my default is color mapping and gamma.

I also find the colors come out differently using the no gamma method. not so close to the real color.

edit; tested, color is same, with 'color mapping and gamma' (gamma set to 1.0) renders faster - no noise difference for me :S where do i access histogram

read 4627 times
12/19/2013 3:01:41 PM (last edit: 12/19/2013 3:37:01 PM)
show user profile  3joez
which version do you use?

read 4602 times
12/20/2013 7:24:04 AM (last edit: 12/20/2013 7:24:04 AM)
show user profile  donvella
2.4 vray, max 2014.

im going to run through that sample test that Ross posted in the vray news post later on this evening see if i can narrow down this oversampling business. I get what you mean but I think the color thresh really solves most noise issues - which is probably why it still renders faster.

read 4600 times
12/20/2013 8:05:33 AM (last edit: 12/20/2013 8:06:11 AM)
show user profile  donvella
after some testing and going through the sampling vray optimisation tutorial posted in the vray news topic - ive come to realise the render speed, noise and sample rate is much faster/cleaner with gamma output 1.0 and color mode "color mapping and gamma'. So thats what im going with ;)... unless im reading this backwards o.O

read 4579 times
12/21/2013 2:31:51 PM (last edit: 12/21/2013 2:37:38 PM)
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