Dome + Aerial Perspective

[waaazoo]

I wonder if someone experienced that already. I think that if I wanted to create it, I never could.
Using Maya 2019.3.1 , Vray Update 2.2, and PhoenixFD 4.00

Simple scene with Phoenix ocean, HDRI dome light and aerial perspective. This happened when I rotated the camera inside a group to 90°.
I tried to rotate the HDRI, but this doesn't change anything.
Bug or hidden feature ?

I have to add that I had a Vray sun before in the scene that was deleted afterwards.

[hermit.crab]

I can't seem to reproduce the issue. Could you attach the scene here or send it to support@chaosgroup.com so we can take a look? Mention this thread in the e-mail.

[waaazoo]

I can't seem to reproduce the issue. Could you attach the scene here or send it to support@chaosgroup.com so we can take a look? Mention this thread in the e-mail.

Thanks. Scene sent to support.

[hermit.crab]

Thanks for the provided scene. It seems a VRayAerialPerspective without a VRaySun has a default location (half of the environment), hence why rotating 90 degrees reveals a portion of the backside (it is noticeable without a camera as well). Note that VRayAerialPerspective is designed for use with VRaySun. Adding a sun is necessary and resolves the issue.

[waaazoo]

Hi,

Thanks. I was aware that Aerial Perspective needs a sun. I would have expected that Aerial Perspective gets ignored when you delete the sun. That's why I posted... It's only an unexpected behavior from what I understand.

[thescopeteam]

you can put in a sun and turn it off, just make sure that the sun is aligned with the sun of the HDR, then it works somehow, not 100% but ...

[damaggio]

Yes, just align the sun with a chrome sphere, you can match almost 100%

[waaazoo]

thanks guy. I was putting a sun, but didn't try to turn it of and keep the aerial perspective. Sure, matching the sun with a dome using a chrome sphere is the way to go.

[fixeighted]

Awesome. I just found this and immediately solved my newest problem that I thought was going to irritate me
Thanks!

[damaggio]

Down underexpose the HDR until the sun is a sharp dot and align the sun "directional light" in IPR.

[fixeighted]

I just eyeballed it and it seems to work fine but thanks, I will certainly do that if it goes wrong.
In theory if the sun is directional, would it really need to be exactly positioned if its shadows are not used?

[damaggio]

If you have a sun than you have shadows, if the HDR is high quality and casts a hard shadow you might not need to position a source light.

[fixeighted]

Oh yeah sure...but I thought this was about the aerial perspective 'needing' a sun (but turned off) in order to work when using a dome with an HDRi.
So what I was meaning is I just eyeball the sun's position so it's close enough to whatever HDRi I use.
Its general angle definitely makes a difference in the shading of the aerial perspective but doesn't seem to need to be 'too' exactly placed, in order for it to work