Picture viewer and VFB not the same

[malindis]

Hi all,

Maybe this issue has already been discussed but I couldn't find it...

The question is quite simple.

When I render an image, why do i have a difference when i look at it from the picture viewer or when i look at it from the VFB ???

Thanks.

Stefan

[TomG]

You'd have to let us know what that difference is - if it's a gamma difference, then there is already a discussion about that under https://forum.corona-renderer.com/index.php?topic=10472, you could add your example images there to that thread. If it is something else, though, some examples showing the differences you are seeing would be needed :)

Thanks!

[Beanzvision]

I can also confirm this. In my video I have two renders, A from the vfb and B from the picture viewer (both going for final renders). When comparing the two there is an apparent difference. None of the textures are animated in any way.

Ben

[TomG]

So in your case Ben, there is a shift in some mapping for the texture, depending on whether you render to Picture Viewer, or render to VFB (and then view it in the Picture Viewer in the A/B comparison there)? I assume that was the difference, one was a "Render to Picture Viewer" render, and one used the Render button in the VFB?

Also, is this what the original poster is referring to, or are they referring to the gamma differences?

Cheers!

[Beanzvision]

Hi Tom, yeah definitely a shift in the mapping. I actually noticed it yesterday when I was making my sexy soap. ;) As for gamma differences I haven't noticed anything on my end.

[Eddoron]

Hi Tom, yeah definitely a shift in the mapping. I actually noticed it yesterday when I was making my sexy soap. ;) As for gamma differences I haven't noticed anything on my end.

Soap? Did you make bubbles? Foam?

[Beanzvision]

Hi Tom, yeah definitely a shift in the mapping. I actually noticed it yesterday when I was making my sexy soap. ;) As for gamma differences I haven't noticed anything on my end.

Soap? Did you make bubbles? I'm currently obsessed with foam and bubbles.

Nah just an organic cake of soap. Foam is definitely an interesting subject to create. I believe I started on something some time back but never finished it. For bubbles I just use the thin film shader in the refl/tex slot. Cheap and nasty ;)

[Eddoron]

I'm looking for a good way to create the inside of bubbly foam. The surface displacement is no problem, but the volume. I've just tried different noise combinations in refraction and vol. scattering so far and wondered if I shouldn't just create geometry and layer those with mograph.

[Cinemike]

I'm looking for a good way to create the inside of bubbly foam. The surface displacement is no problem, but the volume. I've just tried different noise combinations in refraction and vol. scattering so far and wondered if I shouldn't just create geometry and layer those with mograph.

I've seen people doing this by using two planes stacked one above the other, with positive and negative displacement.
Some nice results where to be seen on the site referred to here: https://area.autodesk.com/gallery/shadersxyz-beer-foam-challenge/
The original site is under maintenance currently, though.

[Eddoron]

Thanks, that confirms my idea. I wanted to add multiple planes above each other and maybe add some spheres instanced in that area. Maybe use metaballs.

[Beanzvision]

Yeah shader.xyz have since great examples. I'd really like to create something like this photo one day. The closet I got was fooling around with noise in the refraction channel but still not the same thing.

[Eddoron]

Make the site go up again!

edit: done for today >:(

edit: ok, I have the mapping solutions to bubbles. Foam: I could have multiple cylinders inside each other and use a hard noise with water-level in the displacement. 3D noise is still a problem I'd like to have a texture only solution.

edit: I think I overvalue the foam. The inner parts are barely visible.

edit: if we're living in a simulation, then the real universe outside must be far more complex than ours. wouldn't want to render that.

[malindis]

You'd have to let us know what that difference is - if it's a gamma difference, then there is already a discussion about that under https://forum.corona-renderer.com/index.php?topic=10472, you could add your example images there to that thread. If it is something else, though, some examples showing the differences you are seeing would be needed :)

Thanks!

Hi, you are right... here are to screen shots
It doesn't matter if I start the render from the VFB or from C4d... the result is always like that...

Thanks for your help.

Stefan

[TomG]

So it looks like it's the same issue as in the other thread - to avoid scattered reports of the same / similar thing, could you post your examples in that other thread, and we'll use that one to track this particular issue of color differences / gamma differences between VFB and PV? Otherwise, it gets hard to see all reports of the same issue, and hard to reply to the same issue in several places :)

That was https://forum.corona-renderer.com/index.php?topic=10472

Thanks!
   Tom

[malindis]

Hi,

Yes, no problem...

So it looks like it's the same issue as in the other thread - to avoid scattered reports of the same / similar thing, could you post your examples in that other thread, and we'll use that one to track this particular issue of color differences / gamma differences between VFB and PV? Otherwise, it gets hard to see all reports of the same issue, and hard to reply to the same issue in several places :)

That was https://forum.corona-renderer.com/index.php?topic=10472

Thanks!
   Tom