make sun align with dome light sun

[aiden_humphrey]

Is there a way to make the sun move automatically to remain aligned
with an HDRI dome light sun position as I turn it to select the best sun angle?

[konstantin_chaos]

Hi aiden_humphrey,

There is currently no automatic way to rotate both at the same time.
On the other hand we've introduced Custom Orientation parameters for the Sun light in V-Ray 5 which can help you quite a bit when try to manually match both.

To get you started:
I noticed that when the Sun is in the middle of the HDR image, the Sun's Horizontal Angle has to be set to 270 degrees to match.
If you then rotate the Dome texture with a certain angle, say 90, the same angle (90) has to be substracted from the the Sun's Horizontal Angle, making it 180 degrees.
This is a little counter-intuitive and we can certainly unify the rotations but for the time being you can use the logic I described.

Hope that helps,
Konstantin

[aiden_humphrey]

Thanks Konstantin.
Out of curiosity - is this the way it works in 3DS Max also? Or is this functionality more developed in that application?

[glorybound]

https://www.sinisoftware.com/Plugins/IgNite/Illumi

[aiden_humphrey]

That looks like a good plugin. Thanks glorybound!