Light shadows?

hugo · April 13, 2015, 07:41:36 AM

I'm trying to emulate the attached lighting effect shown in KS

1. What light source would I use, that would create the light spilling out onto background surfaces?
2. How would I construct the background, use HDRI or place object into 3 plane background?

or perhaps a link to a how to video I may have missed

cheers!

Esben Oxholm · April 13, 2015, 08:44:40 AM

Hey Hugo.
I did a quick scene that you can have a look at if you want to.

Besides the cylinder i added a ground plane (edit > add geometry > ground plane) and a sphere which i gave an area light diffuse material.
Have a look for yourself here: https://dl.dropboxusercontent.com/u/2388699/Light%20shadow.bip

Hope it helps.
Ask if you need help for anything

hugo · April 15, 2015, 09:21:15 AM

Hi Esben: I thank you for the input!

hugo · April 15, 2015, 10:56:09 AM

Was a lot easier then I thought, I must have suffered from a premature senior moment

attached is my pic. However strangely... aren't there 2 reflections missing one for -x and the other for -Y ?

richardfunnell · April 15, 2015, 11:01:47 AM

Looks great

I think you would only get those if you had the two opposing walls as well, right now there's nothing to bounce the reflections on to.

hugo · April 16, 2015, 06:12:11 AM

Hi Richard

This attachment is hope illustrates my query a bit better, it shows the 3 interesting planes.
(the ceiling plane was NOT included in the rendering posted prior)

the reflections of reflected shadows are missing.
the reflected objects are NOT missing as I had inferred, they simply don't show because of the standpoint of the observer

richardfunnell · April 16, 2015, 06:58:43 AM

Thanks for the image, that explains the issue! Interesting, it may be due to your light/material settings. Can you share your scene?

I tried mocking it up and was able to get the effect, although it's very subtle. It's visible on my external monitor but not my laptop screen.

hugo · April 16, 2015, 10:06:18 AM

I will upload the scene within the next day..... please stay tuned

Your PS image may well reveal whats really there, if that is true then KS needs a way to control that particular event.
Currently I'm unable to extract that subtle detail from a turntable animation of the Voronoi Sphere rotating within the 3 reflecting planes.

I also run KS on 2 monitors. from 2 different manufactures.
Its never going to happen that one can adjust matching resolutions for each.
That's why a rubber tire, for example, might look too grey and dull on one monitor and perfectly grey and dull on the other.

M_lam · November 02, 2016, 10:40:15 PM

Quote from: Esben Oxholm on April 13, 2015, 08:44:40 AM
Hey Hugo.
I did a quick scene that you can have a look at if you want to.

Besides the cylinder i added a ground plane (edit > add geometry > ground plane) and a sphere which i gave an area light diffuse material.
Have a look for yourself here: https://dl.dropboxusercontent.com/u/2388699/Light%20shadow.bip

Hi Esben,

Pls help!
I meet same shadow problem ... and I can't download your file.

Many thanks!!