Vignette in VFB

[JonasNöll]

Hi,

not sure if it was mentioned before,
but would be cool to have controls for vignette in the VFB.
In the camera you often times can't get the desired effect because the vignette varies with FocalLength and is also affected by DOF.
So if there would be something similar like the Sharpen/Blur as a separate category for adding a vignette with some parameters like defining the vignette gradient, the center of the vignette and so on. That would be awesome.

There is some complicated workarounds how you still can do it in the Composite involving the ExtraTexture and a Gradient ramp, but it's not practical...

[sirio76]

A while back I’ve posted a trick to do that easily, I’ll se if I find the topic.

[sirio76]

Here it is:
https://forums.chaos.com/forum/v-ray...77#post1136177
it works decently, of course a dedicated tool with proper control would be better

[JonasNöll]

Hi, awesome, that really kind of works. I was doing it a way more complex using a ExtraTexture Renderelement and then loading a radial Gradient Ramp in Screen mode inside. And then multiplying that renderelement in a VFB composite before the tonemapping. It works but IPR always needs to wait for the renderelment to generate in order to see it.
With the background image and the 32bit image thats definitely a better solution! Thx

[sirio76]

You are welcome
If needed I can upload the file

[JonasNöll]

Bumping this to hopefully be integrated in the next update. After we got chromatic abberation now in the latest update 2, vignette would make a nice addition in the Lens Effects Tab of the VFB
And while we are at it some film grain would also fit well in there