KeyShot Forum

Technical discussions => Lighting => Topic started by: polar8 on December 16, 2015, 03:48:44 pm

Title: How to achieve smaller shadows?
Post by: polar8 on December 16, 2015, 03:48:44 pm
I'm trying to achieve an effect similar to the render below, where the ground shadow around the edge of the product is quite small, then it drops off to pure white. Regardless of what I've tried within Keyshot, I can't replicate this. I'm starting to think it's actually done in Photoshop- is that the case? Any ideas?


(https://www.keyshot.com/wp-content/uploads/2013/01/gallery-0002.jpg)
Title: Re: How to achieve smaller shadows?
Post by: INNEO_MWo on December 16, 2015, 10:10:43 pm
There is a video in the quick tip collection:

https://youtu.be/Tvh5t2UyuFE?hd=1

You can de-activate  the ground shadow and use  a label as pseudo shadow
Maybe, that helps.
Title: Re: How to achieve smaller shadows?
Post by: Esben Oxholm on December 17, 2015, 01:11:21 am
Hi polar8.

I think that the shadow has been altered in post.
Either it is created from the bottom or it is rendered out and then the exceeding shadows has been erased.
Title: Re: How to achieve smaller shadows?
Post by: PhilippeV8 on December 17, 2015, 04:42:35 am
I don't understand the problem .. or it's not hard at all.  Default studio lighting with a simple 3D.  No post.
Title: Re: How to achieve smaller shadows?
Post by: PhilippeV8 on December 17, 2015, 05:31:11 am
Figured it might be about the environement not being pure white.

Trick to tweek this is to reduce the gamma to below 0.5  ... this way you can clearly see where and where not, you do have shadow still.  After done tweaking, don't forget to up it again to 2.  The attached KSP is for KS5
Title: Re: How to achieve smaller shadows?
Post by: Esben Oxholm on December 18, 2015, 01:25:24 am
Trick to tweek this is to reduce the gamma to below 0.5  ...

Thanks for that tip Philippe. I always used to render the image out, bring it into photoshop and cranck up the contrast there, to get the same sort of effect. Quicker to do it here... and nice result on the shadows!