KeyShot Forum

Gallery => Amazing Shots => Topic started by: Adam_M on April 10, 2013, 09:04:54 AM

Title: Guitar (experimenting with lights)
Post by: Adam_M on April 10, 2013, 09:04:54 AM
Trying to play with light sources to bring out the most important subject on models. This is just a first attempt, I'm open to any and all suggestions.
Title: Re: Guitar (experimenting with lights)
Post by: Josh3D on April 11, 2013, 06:08:49 AM
Very nice. love how the light is shining through the knobs.
Title: Re: Guitar (experimenting with lights)
Post by: Adam_M on April 11, 2013, 06:11:24 AM
Thanks Josh, this was my first time using only IES lights and turning down the environment lighting to almost 0. I think it gives the subject a much more dramtic feel.
Title: Re: Guitar (experimenting with lights)
Post by: Josh3D on April 11, 2013, 08:50:30 AM
Indeed it does. What profiles did you use?
Title: Re: Guitar (experimenting with lights)
Post by: Esben Oxholm on April 11, 2013, 10:42:59 AM
Great start.

Imo the lightning is a bit to hard. Especially the shadows around the knobs is too dark and sharp. Maybe you can soften them up just a tiny bit.
Title: Re: Guitar (experimenting with lights)
Post by: Adam_M on April 11, 2013, 10:53:19 AM
Quote from: josh3d on April 11, 2013, 08:50:30 AM
Indeed it does. What profiles did you use?

I imported the plane, and used teh IES spot light.
Title: Re: Guitar (experimenting with lights)
Post by: Adam_M on April 11, 2013, 10:54:14 AM
Quote from: Esben Oxholm on April 11, 2013, 10:42:59 AM
Great start.

Imo the lightning is a bit to hard. Especially the shadows around the knobs is too dark and sharp. Maybe you can soften them up just a tiny bit.

I thought that a bit as well, I turned the watts down on the light to 20-30 I think. I should prob move the light further from the guitar and make the light not so bright.
Title: Re: Guitar (experimenting with lights)
Post by: evilmaul on April 11, 2013, 07:29:24 PM
it wouldnt change the result if you move the IES light further away because they are point lights and therefore always cast hard shadows. Try an area light instead.
Regardless though, and we all know it would be a cheat ...it will still be nice if the IES lights could have a shadow softness attribute.
Title: Re: Guitar (experimenting with lights)
Post by: Adam_M on April 11, 2013, 07:39:40 PM
Quote from: evilmaul on April 11, 2013, 07:29:24 PM
it wouldnt change the result if you move the IES light further away because they are point lights and therefore always cast hard shadows. Try an area light instead.
Regardless though, and we all know it would be a cheat ...it will still be nice if the IES lights could have a shadow softness attribute.

When you use area light do you ever encounter white dots on your subject?
Title: Re: Guitar (experimenting with lights)
Post by: evilmaul on April 11, 2013, 09:10:21 PM
no..it never occurred to me. What is that about? do you have a pic showing the issue?
Title: Re: Guitar (experimenting with lights)
Post by: Esben Oxholm on April 12, 2013, 12:56:02 AM
Quote from: Adam_M on April 11, 2013, 07:39:40 PM
Quote from: evilmaul on April 11, 2013, 07:29:24 PM
it wouldnt change the result if you move the IES light further away because they are point lights and therefore always cast hard shadows. Try an area light instead.
Regardless though, and we all know it would be a cheat ...it will still be nice if the IES lights could have a shadow softness attribute.

When you use area light do you ever encounter white dots on your subject?

When I use an area light and have added a ground plane, I encounter some white dots on the ground plane. Haven't figured out if it's possible to get rid of them.
Title: Re: Guitar (experimenting with lights)
Post by: Mark_84 on April 12, 2013, 06:34:09 PM
Quote from: Esben Oxholm on April 12, 2013, 12:56:02 AM
Quote from: Adam_M on April 11, 2013, 07:39:40 PM
Quote from: evilmaul on April 11, 2013, 07:29:24 PM
it wouldnt change the result if you move the IES light further away because they are point lights and therefore always cast hard shadows. Try an area light instead.
Regardless though, and we all know it would be a cheat ...it will still be nice if the IES lights could have a shadow softness attribute.

When you use area light do you ever encounter white dots on your subject?

When I use an area light and have added a ground plane, I encounter some white dots on the ground plane. Haven't figured out if it's possible to get rid of them.

the same happens to me dude  :-\

(http://i50.tinypic.com/2rmkzsz.jpg)

(http://i46.tinypic.com/28gxssg.jpg)

(http://i48.tinypic.com/f2px7r.jpg)
Title: Re: Guitar (experimenting with lights)
Post by: evilmaul on April 12, 2013, 07:20:14 PM
hmmm I am not quite sure why that is happening...I just tried something real quick with a mesh, ground plane and a simple plane turned into the 3 different light sources and it all seems to work as expected.

Title: Re: Guitar (experimenting with lights)
Post by: Mark_84 on April 12, 2013, 08:43:18 PM
could you please attach the *.bip file..or send it to me via PM..so we don't spam this thread with our issues.. ;)

thanks a lot ;)

Quote from: evilmaul on April 12, 2013, 07:20:14 PM
hmmm I am not quite sure why that is happening...I just tried something real quick with a mesh, ground plane and a simple plane turned into the 3 different light sources and it all seems to work as expected.
Title: Re: Guitar (experimenting with lights)
Post by: TpwUK on April 12, 2013, 11:48:17 PM
I had the same issue with OSx 10.8.3 running Nvidia with KS4 only. Even though my GTX660Ti is now supported directly by Apple, I still needed to install the Cuda drivers, installing those seems to have fixed this issue for me and as a bonus my renders are even quicker now

Martin
Title: Re: Guitar (experimenting with lights)
Post by: guest84672 on April 14, 2013, 08:52:40 AM
TwpUK - KeyShot doesn't use the GPU.
Title: Re: Guitar (experimenting with lights)
Post by: TpwUK on April 14, 2013, 11:03:00 AM
Thanks Thomas, I am aware that KS don't use the GPU, but with the massive reduction in these cases happening I am assuming the underlying OS that generates the windows/views does

Martin
Title: Re: Guitar (experimenting with lights)
Post by: pikolo on May 02, 2013, 08:19:13 AM
Hello,

Any clues on those dots with the emissive material? I have the same problem and this is the first time I see people with the same exact problem.

how to get rid of them?
Thanks