KeyShot Forum

Technical discussions => Lighting => Topic started by: Alang7™ on April 05, 2015, 02:06:36 AM

Title: [HELP] Directional Shadow
Post by: Alang7™ on April 05, 2015, 02:06:36 AM
Hello guys.

I have some problems about light/shadow system on Keyshot.

I want make a rendering of my 3D model truck with a Backplate + EXR, but the shadow doesn't work good.

My question is: How i can make a realistic directional shadow ?


The EXR + Backplate can be found here: http://www.hdr-sets.com/index.php/free-sets/satellite-01-free.html

I'm using this backplate:

(http://www.hdr-sets.com/00_CONTENT/wa_34_p/pa_1rhuyoi0chq47u/big_107_REF_CHROME_P.jpg?24ccpo1dzhxnjcrq)
Title: Re: [HELP] Directional Shadow
Post by: TpwUK on April 05, 2015, 04:04:57 AM
Have you added a ground plane ?

Martin
Title: Re: [HELP] Directional Shadow
Post by: Alang7™ on April 05, 2015, 04:40:55 AM
Ground plane ?

How it works ? Can you explain me how ?
Title: Re: [HELP] Directional Shadow
Post by: TpwUK on April 05, 2015, 08:25:58 AM
Edit/Add Geometry/Ground Plane - Makes better looking shadows

Martin
Title: Re: [HELP] Directional Shadow
Post by: Alang7™ on April 05, 2015, 09:23:07 AM
I tried, but nothing ...


Title: Re: [HELP] Directional Shadow
Post by: TpwUK on April 05, 2015, 10:32:04 AM
Ok try rotating the environment - Tweak contrast and brightness levels on the environment too

Martin
Title: Re: [HELP] Directional Shadow
Post by: Alang7™ on April 05, 2015, 12:37:39 PM
Nothing ....  :(
Title: Re: [HELP] Directional Shadow
Post by: Esben Oxholm on April 05, 2015, 10:55:55 PM
Hi Alang7
Is it possible for you to share a .ksp of your scene?
I wouldn't mind taking a look at it.

I tried to download the EXR + Backplate from the link you posted, but the webpage doesn't seem to work properbly.
Title: Re: [HELP] Directional Shadow
Post by: Alang7™ on April 06, 2015, 07:48:49 AM
Hello.

Here the Backplate + EXR: http://www.mediafire.com/download/w43jr6qddfbvdkc/Backplate.rar



Title: Re: [HELP] Directional Shadow
Post by: Esben Oxholm on April 06, 2015, 09:43:42 AM
Hi Alang7.
I managed to download the files from the site and it helped me figure out where you go wrong.

Instead of using the EXR you've uploaded you should use the one called "107_ENV_DOMELIGHT.exr". See attached screenshot.

I don't know why they have EXR. versions of all their backplates, like the one you've used.

Let me know if you get it to work! :)
Title: Re: [HELP] Directional Shadow
Post by: Alang7™ on April 06, 2015, 12:30:25 PM
Yes, it now work!  :D

But, one thing. How i can make a realistic dark shadow ? Sometimes the shadow is too light ...
Title: Re: [HELP] Directional Shadow
Post by: Esben Oxholm on April 06, 2015, 10:49:28 PM
Quote from: Alang7™ on April 06, 2015, 12:30:25 PM
Yes, it now work!  :D

But, one thing. How i can make a realistic dark shadow ? Sometimes the shadow is too light ...

Great, that's good!

Is it with this particular HDRI that the shadow gets to light?
Title: Re: [HELP] Directional Shadow
Post by: Alang7™ on April 07, 2015, 08:07:51 AM
Yes.

Render now is done, but the shadow looks too light.

(https://farm8.staticflickr.com/7681/16853031797_0f810be3c7_c.jpg)