Position of 360° Backdrop


grubba
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I've taken several 360° panoramas of the actual building site. How do I rotate the 360° backdrop (z axis) so it aligns to the structure? That is, when I look out of a specific window, I expect to see what is actually there.

 

While at it, is CA (down) resampling these panoramas? The image quality degrades considerably once rendered within CA (compared when rendering the original pano elsewhere).

 

One image shows CA's rendering of the panorama. It's quite low resolution (and pointing about 47° away from reality). The other is a small crop of the same region when looking at the panorama outside CA. I had to crop it a lot because it seems this web site also samples the image way down.

 

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Thanks!

 

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That doesn't seem to work and rotating the entire plan sounds quite drastic for something that should be a fundamental part of assigning a 360°, spherical environment map. One should be able to indicate where "north" is (or some arbitrary 0° vector within the Z axis). In addition, currently the effect only occurs when the camera is rotated. When you move the camera, it feels the same as when using a flat, 2D backdrop. It moves the the entire scene while keeping the environment map static. The intent is to realistically preview what can be seen out of windows and that does not appear to be possible. 

 

When googling for this, I found some references to mapping images to "billboards" and placing them behind windows? I could not however, find out what that means.

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1 hour ago, grubba said:

That doesn't seem to work and rotating the entire plan sounds quite drastic for something that should be a fundamental part of assigning a 360°, spherical environment map. One should be able to indicate where "north" is (or some arbitrary 0° vector within the Z axis). In addition, currently the effect only occurs when the camera is rotated. When you move the camera, it feels the same as when using a flat, 2D backdrop. It moves the the entire scene while keeping the environment map static. The intent is to realistically preview what can be seen out of windows and that does not appear to be possible. 

 

Yes that feature still needs a lot of improvements.   No harm in adding your input to the suggestion forum.

 

1 hour ago, grubba said:

 

When googling for this, I found some references to mapping images to "billboards" and placing them behind windows? I could not however, find out what that means.

 

I think that was discussed in the link I posted earlier but possibly not the basics.  Right click on your User Library folder and  select New > Image  it works the same way as 2d plants.

 

You could try applying your panoramic to the inside of a polyine solid cylinder as a material,  which can be rotated to correct the orientation.  This works fairly well and solves the dizzying model movement problem but I have not been able to do it without messing up the display of shadows.  Always some drawback.  If you could do a cylindrical billboard image I think that would work.

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9 hours ago, Chopsaw said:

Right click on your User Library folder and  select New > Image  it works the same way as 2d plants.

 

Images are slightly different than Billboards , Billboards don't Rotate to the Camera... ( see page 872 of the Ref. Manual )  it's a bit like have a Huge Polyline Solid with the Image Stretched to fit it.

 

You can use Build>Image>Create Image  OR Create Billboard Image for either   but I'm not sure Billboards are available by the Library >New>Image Method

 

M.

 

 

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15 minutes ago, Kbird1 said:

Images are slightly different than Billboards , Billboards don't Rotate to the Camera... ( see page 872 of the Ref. Manual )  it's a bit like have a Huge Polyline Solid with the Image Stretched to fit it.

 

You can use Build>Image>Create Image  OR Create Billboard Image for either   but I'm not sure Billboards are available by the Library >New>Image Method

 

I think that is the only difference Mick.  Just the rotation which is just a checkbox in the same DBX.  

 

I was looking for a default setting the other day and sure enough chief provides the default setting for one of the three items in the same family. :wacko:

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13 hours ago, grubba said:

I've taken several 360° panoramas of the actual building site. How do I rotate the 360° backdrop (z axis) so it aligns to the structure? That is, when I look out of a specific window, I expect to see what is actually there.

I noticed Chop included a link to an older thread about this, but you seem to be saying it didn't work.  My recollection was there were numerous ideas in that thread so I don't know what you tried.  My memory is that the seam in your 360 pano will automatically be at north.  So if the seam in your pano is not actually at north, but you know how far off it is from north, you might try setting north in your model to be whatever it needs to be to get your pano in the right orientation.  To do this you do not need to rotate the model, but simply in the CAD / Lines pull-down go to North Pointer and set it accordingly.  

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2 hours ago, DzinEye said:

My recollection was there were numerous ideas in that thread so I don't know what you tried.  My memory is that the seam in your 360 pano will automatically be at north.  So if the seam in your pano is not actually at north, but you know how far off it is from north, you might try setting north in your model to be whatever it needs to be to get your pano in the right orientation.  To do this you do not need to rotate the model, but simply in the CAD / Lines pull-down go to North Pointer and set it accordingly.  

 

That sounded so good I needed to try it out.  Unfortunately it does not work.  The seam defaults to East but is not affected by the North arrow so it should really be referred to as Chief's 0° which is always to the right and happens to be default East.

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51 minutes ago, Chopsaw said:

 

That sounded so good I needed to try it out.  Unfortunately it does not work.  The seam defaults to East but is not affected by the North arrow so it should really be referred to as Chief's 0° which is always to the right and happens to be default East.

Dang-it!... sorry.  I knew I should've tried it out first....didn't have time.  Faulty memory.  I guess it would've just been too easy if you could control it with the North Arrow pointer.  
So the only two solutions I guess are using Photoshop or similar to create a new seam where East would be located, or do as I think Michael suggested which was to basically build a giant circular billboard around the model with a very tiny seam in it.
 

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  • 2 months later...

I am also interested in taking 360 degree panoramas of my building sites and using them as backdrops in CA. Could your solution be as simple as adjusting the camera orientation in respect to East at the time the picture is taken?  

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2 hours ago, BradKe said:

I am also interested in taking 360 degree panoramas of my building sites and using them as backdrops in CA. Could your solution be as simple as adjusting the camera orientation in respect to East at the time the picture is taken?

 

Yes I believe so but not necessarily East but rather facing the right side of the lot or facing away from the right side of the building the way you intend to draw it.

 

Let us know how it goes.

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  • 3 months later...
On 5/12/2020 at 3:54 PM, DzinEye said:

...I think Michael suggested which was to basically build a giant circular billboard around the model with a very tiny seam in it.
 

Ive read this thread through and the older thread, wouldnt this block out the sun?

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4 hours ago, Lakeside-E said:

Ive read this thread through and the older thread, wouldnt this block out the sun?

I've never done a 360 background myself, but I've done large curved ones that do almost 180... and I've never had issue with the sun

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6 hours ago, Lakeside-E said:

Ive read this thread through and the older thread, wouldnt this block out the sun?

Yes it definitely CAN (depending on the size and position of the symbol and the position of the sun).  I was only offering it as an alternative solution if you really want to use a panoramic image.  The Billboard image method is better for most circumstances.  It just isn't very well suited for panoramic images, typically requires several billboard images instead of just one panoramic image, and results in a much less dynamic affect when re-positioning cameras (without also repositioning billboard images that is).

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17 hours ago, DzinEye said:

I've never done a 360 background myself, but I've done large curved ones that do almost 180... and I've never had issue with the sun

backgrounds dont block out the sun, chief knows how to handle the background in relation to it, but a cylinder solid object is different. I learned about using billboards yesterday which is the image unaffected by the sun so that is an option in some cases but still not a perfect system.

 

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15 hours ago, Alaskan_Son said:

Yes it definitely CAN (depending on the size and position of the symbol and the position of the sun).  I was only offering it as an alternative solution if you really want to use a panoramic image.  The Billboard image method is better for most circumstances.  It just isn't very well suited for panoramic images, typically requires several billboard images instead of just one panoramic image, and results in a much less dynamic affect when re-positioning cameras (without also repositioning billboard images that is).

yesterday i was following several threads on the topic kinda getting up to speed where everyone else has been. several talked about billboards but i thought they were just talking about the poly solid in front of a window trick ive seen before. Solver walked me through importing a billboard and now i know the difference. i didnt know if there was a way to combine the billboard feature with a cylinder around the plan trick or even a sphere around the plan trick  but it seems there is not...

 

It did just occur to me as I was typing this, could you set the material to a translucent to let some light through? My suspicion is that it would wash out the picture. has anyone tried this yet?

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