I can't get my preview renders to match my render to file! Can someone please explain what the optimal settings are?
What is the purpose of this change??? I understand that some people don't have their monitors calibrated, but I do--but now I have to render to file anytime I want to see what something will look like, which makes the quick render useless!
Full Version: preview renders, new gamma setting,frustration
The lower part of the gamma option tells Animation:Master what the user is seeing. If the user reduces the gamma, then it lets A:M know that the user's monitor is brighter than what it should be, so it will render (in every view) what the user should be seeing; A:M will artificially increase the gamma of all renderings, be they progressive or final, so that they will match industry standards. To calibrate the gamma setting, the user should step back until the horizontal black and white bar box appears to be a solid color. This can be anywhere from ten to thirty feet away. The user would then adjust the Current Gamma value until the gray box matched the same brightness as the horizontal bars box. The user can then choose what gamma they want to render at with their corrected adjustment (For CRT Monitors, a Desired Gamma of 1 should be used). If the Current Gamma value is 2.2, then the monitor's gamma is correctly calibrated.
As far as your problem Will, you should be able to see the affects of gamma correction when you use a progressive render.
Click to view attachment
As far as your problem Will, you should be able to see the affects of gamma correction when you use a progressive render.
Click to view attachment
Just set "Desired Gamma" to 1.0 and "Current Gamma" to 2.2, their default values. This way, there will be no gamma correction to your preview renders.
If you intend to add a gamma correction to your final render either as a post process in A:M or in the output properties or even though another application, then setting the "desired gamma" to the gamma value you intend to add to the final render will allow you to preview the light intensity as it will appear after the gamma correction is applied.
If you want to see how the render will look on the vast majority of non-corrected monitor on the market, then adjust the "Current Gamma" to match your monitor. If your monitor is already calibrated, then it should already be set at 2.2. For any monitor calibration, the "Current Gamma" can be frustrating because setting it to anything other than 2.2 will produce previews that are different than how the final render will look on the same computer it was rendered. However, when working on a group project, it is a mean for all project participants to see the previews in one uniformized way. This way, if several people light different ses for the same project, they will all preview the lightings with the same gamma correction.
If you intend to add a gamma correction to your final render either as a post process in A:M or in the output properties or even though another application, then setting the "desired gamma" to the gamma value you intend to add to the final render will allow you to preview the light intensity as it will appear after the gamma correction is applied.
If you want to see how the render will look on the vast majority of non-corrected monitor on the market, then adjust the "Current Gamma" to match your monitor. If your monitor is already calibrated, then it should already be set at 2.2. For any monitor calibration, the "Current Gamma" can be frustrating because setting it to anything other than 2.2 will produce previews that are different than how the final render will look on the same computer it was rendered. However, when working on a group project, it is a mean for all project participants to see the previews in one uniformized way. This way, if several people light different ses for the same project, they will all preview the lightings with the same gamma correction.
I just want to Wave (emphatically) my hand in the air about how annoying it is to do spend a day on a project, get something beautiful in the preview renders and then set it to render overnight and and wind up with a pile of useless junk.
And the fact that you have to search for a 3 month old thread in the
on-line forums to find the magic values to be able to render out what you see on the preview...
How about an option to disable gamma adjustments altogether? If I need gamma adjustments I can turn em on instead of forcing a level of complexity that, frankly, is nothing but an annoyance for those of us who aren't working on TWO.
Oh and I just did a reinstall of 14c and the gamma values default to 1.2 and 1.2 which makes for a fairly significant change when you render.
And the fact that you have to search for a 3 month old thread in the
on-line forums to find the magic values to be able to render out what you see on the preview...
How about an option to disable gamma adjustments altogether? If I need gamma adjustments I can turn em on instead of forcing a level of complexity that, frankly, is nothing but an annoyance for those of us who aren't working on TWO.
Oh and I just did a reinstall of 14c and the gamma values default to 1.2 and 1.2 which makes for a fairly significant change when you render.
If you did your lighting balance with gamma 2.2 in the preview render, all you have to do is to add a gamma 2.2 (NTSC/sRGB) in the render pannel. Then, the resulting render will look the same as in the preview.
The preview gamma is not only for group work. Its main purpose is so you can do your lighting balance more realistically. 3D renders should be gamma corrected just like photos are. See attached image. The bottom render was gamma corrected while the top one was not. See how the top one exibits very fast light falloff with hot spots and dark shadows. You don't see that in the gamma corrected render. It almost looks like it was lit with AO although the scene was lit with only two bulb lights.
The preview gamma is not only for group work. Its main purpose is so you can do your lighting balance more realistically. 3D renders should be gamma corrected just like photos are. See attached image. The bottom render was gamma corrected while the top one was not. See how the top one exibits very fast light falloff with hot spots and dark shadows. You don't see that in the gamma corrected render. It almost looks like it was lit with AO although the scene was lit with only two bulb lights.
Images can be saved under the EXR file formate to get a floating point for all three color bands. You can then use the A:M compositor to adjust the gamma and exposure levels.
Yves, did you increase the gamma and lower the exposure on this shot, or was that image handled by only the gamma correction?
Yves, did you increase the gamma and lower the exposure on this shot, or was that image handled by only the gamma correction?
Only a 2.2 gamma correction. But you are right. Decreasing the exposure by one f-stop first is a good trick. But then, you have to apply an S-curve before the gamma correction, like they do in digital camera, to regain that f-stop and flatten the highlights. This gets rid of the hot spots in the image.
Of course, this is only possible if the image was saved in OpenEXR format. If the image was saved in tga format, then a 2.2 gamma correction can still be applied in Photoshop with the middle cursor of the "Level" dialog. The Photoshop gamma correction emulates the sRGB standard for the gamma curve which straightens a part of the curve in the darkest shades and avoids too bad banding in the dark shadows.
Of course, this is only possible if the image was saved in OpenEXR format. If the image was saved in tga format, then a 2.2 gamma correction can still be applied in Photoshop with the middle cursor of the "Level" dialog. The Photoshop gamma correction emulates the sRGB standard for the gamma curve which straightens a part of the curve in the darkest shades and avoids too bad banding in the dark shadows.
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