LightMix

[glorybound]

Every time I stop a render my light mix resets to default. Frustrating as heck.

[fixeighted]

Yes, I keep meaning to post a topic about that - you have done it for us all. It is extremely annoying.
You can save the settings as a file but that still is only mildly less irritating

[^Lele^]

Well it makes sense that it should.
How is the software supposed to know that the user hasn't changed things in the scene?
Each render is, *by definition*, a new problem to solve.
Scanning a scene for changes every time someone presses f9 is impractical (to be kind), while a checkbox to "keep current settings" is dangerous (as the behaviour when things have surreptitiously changed would be an unknown.).

The workflow is "render -> lightmix -> transfer -> render".
That you'd like to transfer it to scene or composite will depend on the plans/workflow you have, but transfer it you really should (it's exactly the same conceptual workflow as auto-exposure.).

[fixeighted]

I see your point.
I think, like with many things, I see this as an explanation that should be a piece of information that is listed in documentation, to skip the inclination to think that it is not WAI.

[glorybound]

Render, setup light mix, stop, and tweak, is the typical workflow, no? It would make more sense for it to stay as it was set and you can reset it for the next render. Just my opinion.

[squintnic]

Agree with Bobby here

[^Lele^]

I agree with bobby too.
One just needs to transfer to scene before rerendering.

[fixeighted]

I think we were thinking of it more as a post 'effect', rather than wanting to change things and bake those to the scene every time we change something to see how it looks. I was anyway.
The way I used it was to switch things off/on and to adjust mults to see how things looked. The thing with that is when I wanted to change the view then it it reverted.
I saw I could save the altered settings to a file to stop that occurring, hence solving that - although not as handy as a check box allowing me to keep the settings until I wanted to
transfer them

[yavor.rubenov]

Hello,

It is in our TODO list to actually keep all the LightMix modifications whenever possible. Currently we reset the LightMix if there are any changes in the rendered image - new render elements for example but also other cases.

Best regards,
Yavor

[Ahmed Sharif]

I also think it should remember the changes in Lightmix after restarting a render. This is important for when you're using multiple passes with plugins like RPManager. In Vray Next when you had multiple cameras, RPM stored separate framebuffer parameters per pass. That feature seems to be missing in Vray 5 at the moment, I'm not sure if it's from Chaos's side or RPM developers.

So with Lightmix, in one pass you might want Light X to have a certain intensity, and in another pass you might want to use a lower/higher amount. This way you can keep the scene amount the same, and control the strength in the framebuffer for each pass.

[william.morris]

I also agree extremely frustrating that it resets after every render. I agree transferring to to scene, once you are finally happy with all the tweaks you have made to the lights!

Multiple cameras.... I may have certain lights that i only switched on for certain camera scenes, if you have to keep toggling them on and off after each render it gets frustrating.

Also you may have multiple lights so you can switch between day and night in one render, so it makes sense to have the option for them not to reset and all be switched on after every render.

Hope that's implemented in next release!

[yavor.rubenov]

The stable nightly build from today (build 30332) - contains the fix about the LightMix reset in IPR sessions (https://nightlies.chaosgroup.com/mai...e_5.0/20200917)

[fixeighted]

Thank you so much for this! It has significantly reduced my frustration levels

[yavor.rubenov]

Glad to hear Sorry for the initial inconvenience.

[fixeighted]

No problem....software evolves and it's just cool that our feedback is so quickly acted on