manyip
Posts: 1
Joined: Fri 21 Sep 2018 17:19

Sun Shadow control Artlantis 5.0 to Artlantis 7.0

Fri 21 Sep 2018 17:29

Hi, I've a question about sun shadow control. I recently upgrade from artlantis 5 to artlanstis 7. In Artlantis 5, I could control the sun shadow from bright day light hard shadow to overcast day light soft shadow by controlling Sun and Sky power under heliodons. However in Artlantis 7, the sun shadow hardness is the same or change slightly regardless the Sun or Sky power control under heliodons.

Attached are two images render in 5.0 and 7.0.
For 5.0, the Sun is set at -70 and Sky is set at +25.
For 7.0, the Sun is set at -99 and Sky is set at +81.

To conclude my question. Is there any way to control shadow hardness in Artlandtis 7 under different sky condition. shadow darkness / softness / HDR control? From clear sky to overcast cloudy sky. Any advice would be much appreciated. Thank you.
Attachments
6.jpg
6.jpg (580.93 KiB) Viewed 164 times
4.jpg
4.jpg (2.83 MiB) Viewed 164 times

kgriffith
Posts: 110
Joined: Thu 2 Feb 2017 15:30

Re: Sun Shadow control Artlantis 5.0 to Artlantis 7.0

Mon 24 Sep 2018 11:37

I believe the only way to do what you are looking for is to use HDRI for lighting. Since Artlantis 6, when the change was made to the physical engine, you can no longer produce soft shadows any other way. A bit ironic as the new physical engine is supposed to be more accurate, but you can no longer get realistic lighting other than for bright sun conditions...


While HDRI is not a bad option, one of the strengths of Artlantis is the ability to use actual context photos for your background, which you can't do if you use HDRI (well, you can if you make your own HDRI image, but I figure that would take me far longer than the actual rendering work in Artlantis...)

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CamilleSarrut
Posts: 395
Joined: Tue 20 Oct 2015 08:41

Re: Sun Shadow control Artlantis 5.0 to Artlantis 7.0

Tue 25 Sep 2018 10:55

Hello,

Since version 6 we are using a physical engine, this is why we have removed some of the heliodon controls.
It is difficult to see the difference in sun shadows in both images as the heliodon are not set to the same position.

Could you render an image in V5 and V7 with the same heliodon position, this way the shadows will be shown at the same position and we will be able to see the difference.

Also please name the images with the Artlantis version used to render it...

Best regards,
Camille Sarrut
Abvent R&D

kgriffith
Posts: 110
Joined: Thu 2 Feb 2017 15:30

Re: Sun Shadow control Artlantis 5.0 to Artlantis 7.0

Fri 28 Sep 2018 10:40

Does Abvent hope to eventually restore some of the lost controls, in some fashion, or is the current state of heliodon controls considered the final state? Thinking specifically about soft shadows, atmospheric effects, etc.

kgriffith
Posts: 110
Joined: Thu 2 Feb 2017 15:30

Re: Sun Shadow control Artlantis 5.0 to Artlantis 7.0

Tue 2 Oct 2018 16:17

OK, I guess no answer is an answer - this is not something to look for anytime soon.

So, as a workaround, is there any way to use HDRI images for lighting only, and still use a background image for context? Right now I believe they are mutually exclusive.

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