Spherical images tilted/skewed

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Po7
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Joined: Fri Jun 19, 2020 8:23 am

Spherical images tilted/skewed

Post by Po7 » Fri Jun 19, 2020 8:45 am

Hello everyone,

First of all my apologies if my explanation is not as clear as it could be, as English is not my first language.

When I do a spherical render in Twilight Render, a problem occurs : my ceiling is not horizontal in 2 of the 4 directions.
When I then upload the image in a 360° tool, 2 directions (let's say north and south) of the image are completely fine, but when I turn to the other 2 directions (let's say east and west), the ceiling is not horizontal at all, it seems like we're looking at the picture with our head tilted... And it's really not a pleasant 360° experience.
I attached a picture so you can see what i mean.

I have found it seems to happen especially if the room is small... At least it didn't happen to my render for a big living room space, which has a perfectly horizontal ceiling in the whole 360° picture.

Is there a way to avoid this issue ?

Thanks a lot for any help !
Attachments
Test TR.jpg
Test TR.jpg (181.94 KiB) Viewed 300 times

Chris
Posts: 5092
Joined: Sun Mar 08, 2009 3:00 am
OS: Win10
SketchUp: 2016

Re: Spherical images tilted/skewed

Post by Chris » Fri Jun 19, 2020 1:56 pm

Two questions -
Is your camera perfectly level with the horizon?
What is the height of your camera? If it's not a "natural" human height, (~6ft, 2m), it may look strange

Po7
Posts: 2
Joined: Fri Jun 19, 2020 8:23 am

Re: Spherical images tilted/skewed

Post by Po7 » Fri Jun 19, 2020 2:08 pm

Thank you so much ! That was it - my camera was slightly looking downwards. It works now :)

Fletch
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Re: Spherical images tilted/skewed

Post by Fletch » Fri Jun 19, 2020 7:28 pm

Glad you found the fix. :^:

Subject: Setup and Render a Panoramic or Panorama View
Fletch wrote:
Mon Dec 17, 2012 3:06 pm
To display the spherical of the museum in a forum or on a website you must register for a website which displays these spherical images in a web browser. one example was pan0.net


remember - use the SU tool with the guy with the red x at his feet to place your camera horizontal. Don't click and drag when you place your camera with that guy. You simply click on the floor where you want to place your camera. Then use the walk-around two feet icon to position the camera exactly where you want while maintaining the Z axis perpendicular.

2 point perspective only works with Twilight without panning around after you choose it.

Read these steps carefully
  1. Find a view that would be interesting as a spherical image using the little guy with a red X at his feet that is the Position Camera tool in SketchUp, and then the little "Walk" tool footprints to adjust the camera.
  2. This method of camera placement guarantees that the eye will be level with the ground. This step is critical for making a good spherical image for Architecture!
  3. Add new scene when camera is positioned properly.
  4. Open Twilight Render Dialog
  5. Set image resolution to 2500x1250 (any 2:1 proportion will work)
  6. Click Camera tab in Render Dialog
  7. Set Camera type to Spherical
  8. Render
  9. Added watermark in Photoshop. No other post pro done to image.
Then upload your spherical image to the website
get the code for the image link
post it to the forum like this:

Code: Select all

[url=http://pan0.net/w/up-1516][img]http://pan0.net/data/users/panos/thumbnails/759/1516.jpg[/img][/url]  Second test here: [url=http://pan0.net/w/up-1523][img]http://pan0.net/data/users/panos/thumbnails/759/1523.jpg[/img][/url]
Result is this:

Image Second test here: Image

or get the html embed code for your image, and put it on your webpage.

There is no way to limit the spherical image to 180 degrees from within Twilight, but what you could do is create a black box around your camera with one open side so that the camera would render the spherical image normally, but be basically pure black wherever you do not want to see. Then you can cut that part off in photoshop as Chris mentioned.

There are literally thousands of tutorials, websites, and softwares and/or plugins for wordpress or joomla websites, all of which can guide you how to embed a partial-panoramic image into your website. It depends on many things. Some plugins or other software use flash, some use pure html 5 or java, etc.

There's a plugin for SketchUp that will automatically set up the 6 cameras if you want to use it - I think you can search for 'cubic pano out sketchup plugin' or something like this. I never used it because I like the convenience of Twilight's spherical camera. One cam, and one click.

Remember that large white surfaces can take a long time to clear up. Using a denoise software will handle those pure white surface quite well and save you lots of render time. Topaz Denoise 5 and Neat Image and Noise Ninja are some products to think about.


Subject: Convert a spherical render into a 360 image
Fletch wrote:
Mon Jul 29, 2019 8:33 pm
welcome, theunusual!

Thanks for the information. We will look into your new tool!

Without any tools, one can post a 360 Spherical render to Facebook like this:
Now that I have rendered a spherical equirectangular image with Twilight Render V2.0. How can I upload it to Facebook?
Or does it have to be mapped differently?

It has to be an equirectangular panorama 1:2, then change the exif data to: CAMERA: RICOH and CAMERAMODEL: RICOH THETA S, then upload the image and Facebook automaticaly recognizes the pano.

Change this EXIF data using Windows Explorer - select an image and right-click and choose>Properties>Details Tab scroll down to click in any field and change the data.

One may also create a 360 Video animation using Twilight Render:
Subject: How to Create a 360 degree video with Twilight Render

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