KeyShot Forum

Technical discussions => Cameras => Topic started by: kwaikeong1402 on August 07, 2011, 10:21:48 PM

Title: Camera two point perspective ?
Post by: kwaikeong1402 on August 07, 2011, 10:21:48 PM
Hi...I would like to know whether keyshot have camera two point perspective setting?
For example,keyshot default setting is perspective. If I see the furniture from the top,the vertical line not straight.
How to set it become straight?

Thank you!!
Title: Re: Camera two point perspective ?
Post by: Robert V. on August 08, 2011, 12:45:01 AM
Good news, keyshot has this!

Enable "Orthographic" in the "options>camera"-tab
Title: Re: Camera two point perspective ?
Post by: kwaikeong1402 on August 08, 2011, 06:55:55 AM
First of all, the vertical line still not straight. Is Keyshot have same function like two point perspective?

Title: Re: Camera two point perspective ?
Post by: kwaikeong1402 on August 08, 2011, 06:59:53 AM
Then even I enable the 'Orthographic' , the result of photo also not really nice.
Title: Re: Camera two point perspective ?
Post by: kwaikeong1402 on August 08, 2011, 07:01:40 AM
I using keyshot run this photo, it facing same problem also.
Title: Re: Camera two point perspective ?
Post by: kwaikeong1402 on August 08, 2011, 07:03:31 AM
This photo vertical line is straight, it using another to run.
May I know keyshot can do this setting or not?

Thank you !!
Title: Re: Camera two point perspective ?
Post by: m2tts on August 08, 2011, 07:43:06 AM
No, I do not think Keyshot can create 2 point perspective. The view mimics a camera which is a true three point perspective. You can set it to orthographic and get an isometric if you set the camera position sliders correctly. you could get sort of close to 2 point if you make your rendering, then use the skew tool in Photoshop. The thing with Keyshot is that it's trying to create photorealistic renderings; which means 3 point perspective. 2 point perspective is artificial, but useful for certain architectural renderings. Architecture photographers use "view" cameras whose bellows can be manipulated to skew the image projected onto the film plane for this reason.
Title: Re: Camera two point perspective ?
Post by: Chad Holton on August 08, 2011, 08:10:42 AM
Hi kwaikeong1402,

Be sure to keep the "Inclination" and "Twist" setting at 0 under the Camera tab to achieve this.
Title: Re: Camera two point perspective ?
Post by: kwaikeong1402 on August 08, 2011, 09:12:17 AM
Sorry, maybe I unable explain the actual situation to you.BTW, inside 3ds max got this setting. It can adjust the vertical line become straight.
I just want to share with others whether keyshot can adjust it or not. ???
Thanks to all....
Title: Re: Camera two point perspective ?
Post by: kwaikeong1402 on August 08, 2011, 09:13:03 AM
 ;)
Title: Re: Camera two point perspective ?
Post by: m2tts on August 08, 2011, 09:17:30 AM
That's pretty cool.

Keyshot cannot do this.
Title: Re: Camera two point perspective ?
Post by: Chad Holton on August 08, 2011, 01:24:38 PM
You explained it just fine. Pictures are always nice too. Here's what I ended up with using KeyShot.

Title: Re: Camera two point perspective ?
Post by: Chad Holton on August 08, 2011, 01:42:42 PM
I'd like to see your cubicle rendering (untitled-3, shown above) again with the inclination value at 0.
Title: Re: Camera two point perspective ?
Post by: kwaikeong1402 on August 08, 2011, 10:05:26 PM
cholton thank you for your response :D
Title: Re: Camera two point perspective ?
Post by: kwaikeong1402 on August 08, 2011, 10:18:17 PM
 ;D
Title: Re: Camera two point perspective ?
Post by: kwaikeong1402 on August 08, 2011, 10:19:04 PM
 ;D
Title: Re: Camera two point perspective ?
Post by: kwaikeong1402 on August 08, 2011, 10:19:39 PM
 ;D
Title: Re: Camera two point perspective ?
Post by: Chad Holton on August 09, 2011, 05:59:56 AM
Thanks for trying it out. :) You can narrow the pixel width to help the times a little and/or remove the ground shadow too (depending on your needs).
Obviously, this may not work for every angle you desire with 2 point perspective, but I just wanted to point out it was possible for some.
Title: Re: Camera two point perspective ?
Post by: kwaikeong1402 on August 09, 2011, 06:42:38 AM
Oic...hopefully keyshot will add in and improve this 2 point perspective function in new version.....hahahahahaa.... :)
Title: Re: Camera two point perspective ?
Post by: elliasp on August 09, 2011, 03:53:53 PM
Excuse me guys,

but as a professionnal photographer, it's called "lense aberation".

Indeed, when we have to resolve this problem, we play with focal lenght (in camera settings)....

For Keyshot it's the same : if you want to resolve this problem, you have to play with focal lenght : see exemples below, you will understand what I mean...

+++
F
Title: Re: Camera two point perspective ?
Post by: kwaikeong1402 on August 10, 2011, 07:38:24 AM
Oic :) i will try
Title: Re: Camera two point perspective ?
Post by: Robb63 on August 12, 2011, 08:01:27 AM
I noticed you are using 35 as the focal length of the lens, try increasing this to 150-200 (or higher) that should fix the convergence issue. Just like a real SLR camera using a longer lens