vraySphereFade improvement - render also what's behind

V-Ray V-Ray for 3ds Max Requests
1

I’m working on an animation atm, and have encountered a problem.

Looks like rpc’s are not evaluated correctly for motion blur, they seem to stay in the same place (relative to frame coordinates) for 2-3 frames and then jump to the right position. It looks weird, as if people standing on a balcony were jumping from place to place :confused:

edit: actually they’re not moving, but flipping constantly between 2 frames of the rpc… rpc sux…

It’s a whole night of recalculating the animation…
So I thought about vrayspherefade to correct that error, but unfortunatelly the situation is much more difficult - the rpc is on a balcony, that overlooks large park area, and they are viewed from behind. VraySphereFade clips only what’s inside the sphere…

Full render:

Clipped with a sphere:

Here’s my wish - would it be possible to include an option for the sphere to act as a mask, and render everything that it covers viewed from the camera (like the trees, lake and everything that’s behind the sphere)?
Something like an animatable region rendering.

any thoughts?

cheers!

Maciej

2

There is an option to render “crop selected.” I wonder if this function would work with dummy objects…then you could do almost exactly as you say by enclosing the RPC in a dummy sphere and rendering with the dummy sphere selected… :?

3

it actually sounds more like you just want to render region, but have a way to have that animated.

I’ve wanted that before. I would also like that to be a custom shape even.

If vray could do it that would be great. I wouldn’t want Just a sphere with that option either. If you want everything that’s shown in that particular shape then it sounds more like a 2D (based on camera space) option.

4

since quite a few builds the renderregion is animateable as we requested that for several reasons (and most likely other ppl too)

Regards,
Thorsten

5

how? :shock:

6

Hi,

it’s not exposed to the UI, but you have access to the render region type of vray and the crops with maxscript.

It’s possible to write a script that will animate the crop so it follows an object for example.

Best regards,

Dieter

7

that may be so, but it would be a whole lot nicer if you weren’t limited to a non-rotated rectangular region.

8

ok I found a workaround.

Tou have to place a flat plane inside the sphere gizmo, make sure it’s faced towards camera, and apply a fully refractive material, ior 1.01, no reflections, affect alpha. That way you get rendered not only whats INSIDE the sphere, but also what’s BEHIND it - since everything get’s refracted by the plane, and the plane itself is iniside the sphere.

and - what’s most important - it works in animations :smile:

cheers!

Maciej

9

great idea for the workaround --- but why the 1.01 ior and not 1.0?

10

1.0 looks screwed in mat editor, and since there’s no visible difference between 1.0 and 1.01 on a plane I opted for 1.01.

maybe 1.0 works too, didn’t try it yet;)