New contrast function

[maru]

Knowing that Photoshop is capable of some 3d effects it's starting to sound like a vfb inception.

[modern_babylon]

I think the contrast control is great...but I have a question regarding the units setup. Unlike the video posted, if I were to change the units from 1 to 1.1 the contrast variance is huge (terrible and huge). Obviously I can get around this by increasing the number of decimal places ( 1 to 1.01) and the change is much more reasonable but my question is why is there such a difference between mine and the one shown in the video. has it something to do with the unit setup somehow (I work in millimeters)? Or is there another step perhaps I have missed in the initial install or setup.

Thanks in advance for any help.

[Ludvik Koutny]

I think the contrast control is great...but I have a question regarding the units setup. Unlike the video posted, if I were to change the units from 1 to 1.1 the contrast variance is huge (terrible and huge). Obviously I can get around this by increasing the number of decimal places ( 1 to 1.01) and the change is much more reasonable but my question is why is there such a difference between mine and the one shown in the video. has it something to do with the unit setup somehow (I work in millimeters)? Or is there another step perhaps I have missed in the initial install or setup.

Thanks in advance for any help.

The change was made after release of Alpha V5, in one of daily builds. Alpha V5 public release still contains the old contrast function, that does not work very well. New public Alpha with improved contrast should be released soon.

[modern_babylon]

Great, thank  you.

[peterguthrie]

Anyway, the contrast tool is ok, but what would eventually be really cool, would be full curve editor. Most of the time I like boosting midtones, not highlights or shadows.

Strongly agree with Juraj, curves would be a must for me.

PS. Hello everyone, first post here :) Just downloaded Corona yesterday and really enjoying playing with it so far!

[Ludvik Koutny]

Anyway, the contrast tool is ok, but what would eventually be really cool, would be full curve editor. Most of the time I like boosting midtones, not highlights or shadows.

Strongly agree with Juraj, curves would be a must for me.

PS. Hello everyone, first post here :) Just downloaded Corona yesterday and really enjoying playing with it so far!

Hi and welcome!

Contrast function is there so that people do not touch gamma. Some were using gamma to make their renders more contrasty, which was wrong. So far, it is not intended for corona to be a post processing package. I agree that curves are great for quick preview, but they will need to be implemented carefully so that it does not bloat user interface or is not painful to use (like in case of vray).

At the moment, primary workflow is simply to post process the output in external packages, like photoshop ;)

[Ondra]

PS. Hello everyone, first post here :) Just downloaded Corona yesterday and really enjoying playing with it so far!

[fellazb]

Hi there,

First post here on this forum, so I'd first like to thank you guys for making this render-engine. It's definitely rockin'!

To add something to this thread I'd like to point out this plugin I found recently and it contains a lot of features requested here. Perhaps it's something to look into. Unfortunately it doesn't work interactively with Corona (only after stopping the render), but shouldn't be that hard to implement I guess.

http://www.monotoneminimal.com/vfb

Happy rendering everyone, Corona makes it really addictive.

[higgledyhiggles]

So should gamma be on or off in max ? I`ve noticed in v5 contrast is waaay more sensitive in some scenes than the video, even approaching 1.5 can make blacks go nuts. 40 would be almost infinite. What wrong button have I pressed ?

[Ondra]

I`ve noticed in v5 contrast is waaay more sensitive in some scenes than the video

There is a reason the video is called NEW contrast function.... ;)

[Rotem]

To add something to this thread I'd like to point out this plugin I found recently and it contains a lot of features requested here. Perhaps it's something to look into. Unfortunately it doesn't work interactively with Corona (only after stopping the render), but shouldn't be that hard to implement I guess.
http://www.monotoneminimal.com/vfb

I'm the developer of that plugin. Unfortunately it doesn't work with Activeshade implementations like Corona interactive mode or VrayRT, but I'll try to improve upon that in future versions. It does however work interactively with Corona when used as a regular production renderer, please contact me if it doesn't work for you (I don't want to hijack this thread).

[higgledyhiggles]

There is a reason the video is called NEW contrast function.... ;)
[/quote]

Thought this was for v6. Didn`t even check. What a Maroon. Thanks.