Elements Stretched in 3D Perspective View

[_GT_]

Hi,

I'm having a problem whereby inserts and components of various kinds are appearing elongated in 3D views. Below are a section view correctly showing a wall with a window and TV in/on it, and a problematic perspective view of the same elements in which both are stretched (the TV is stretched more).

Based on earlier posts about distorted 3D views, I've already tried the following:

- Confirm that model is close to Internal Origin.

- Update graphics card drivers.

- Disable hardware acceleration.

- Delete view and create new.

- Create new project.

I also understand that CAD elements in the project can cause such problems. Some manufacturer-produced furniture families that I've included in the project seem to have been derived from CAD geometry and they appear under the Imports tab of Object Styles. They were loaded as Revit families though and I'm wondering if it's even possible for CAD geometry to cause any problem once it's taken the form of a Revit family. There are no CAD imports other than the above and no linked files of any kind.

Cameras placed elsewhere in the model generate the same distortion, which I notice is always greatest at the edges of the view. Maybe some amount of this effect is actually intentional but the TV can't be 2' tall and 14' wide.

Any thoughts would be appreciated.

Thanks.

 

[barthbradley]

Post the RVT here and let us take a look at it. 

[syman2000]

Looks like you use wide angle in the very small tight room. I would use the wheel option to change the focal length of the view

[barthbradley]

.

[_GT_]

Thanks. It won't let me post the file though - "exceeds maximum size". I don't know if there's a way to shrink from 249MB to 71MB.

[_GT_]

Thanks. I did explore that but it doesn't seem to eliminate the problem. It is indeed a wide view for such a small space. It is an unusual project in that I only need a very small space to be finished for the purposes of some imagery. But the images have to occupy a large amount of the field of view.

[barthbradley]

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@_GT_ wrote:

Thanks. It won't let me post the file though - "exceeds maximum size". I don't know if there's a way to shrink from 249MB to 71MB.

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Try zipping it up.  

[_GT_]

Zipping reduced the size by only about 5%. I just deleted dozens of unnecessary families from the project and strangely, it seems to have had no effect.

I'm still working on it.

[syman2000]

Adjusting the target point to focus on the wall mounted TV. 

[_GT_]

I tried that and found that it would cause the TV to be represented accurately. The problem then is that all elements at the edge of that newly-oriented view are stretched. So when the TV is correct, the window on the adjacent wall is incorrect. Anything near the edge is distorted, regardless of the view direction.

I'm starting to think that there is no error and that Revit is just not equipped to display elements accurately in such a wide angle view.

[barthbradley]

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@_GT_ wrote:

Zipping reduced the size by only about 5%. I just deleted dozens of unnecessary families from the project and strangely, it seems to have had no effect.

I'm still working on it.

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FWIW: 

Best Practices for model maintenance in Revit (autodesk.com)

[_GT_]

Thanks. The abundance of unused families is not ideal but my template includes many to minimize importing later. I could probably store even the non-loadable families elsewhere to increase performance, I suppose.

[barthbradley]

how far from the Internal Origin are you modeling? 

https://help.autodesk.com/view/RVT/2023/ENU/?guid=GUID-3F79BF5A-F051-49F3-951E-D3E86F51BECC

[_GT_]

As far as I can tell, I'm right on top of it - see below.

I'm still not able to reduce the size of the file by more than 5% or so. I would have expected this simple model of one small building containing almost nothing to be far less than the file upload limit.

I should note that I'm using Revit LT, in case that's relevant.

This doesn't seem a very demanding task. I'm simply trying to model a modest office background to be used for video calls. Because it is to be modest, I can't just expand the space to make it look like HQ of a multi-national corporation. It has to be a relatively small space displayed widely enough that it can occupy the full background. Maybe this just isn't so easy to accomplish, based on certain technical limits of the software that I don't understand. 

[barthbradley]

You sure are. Scratch that one off the list of possible culprits. 😉 

[barthbradley]

Wait a  minute. That's not the Internal Origin you are showing. 

[_GT_]

Are you sure? This is an excerpt of the help file on this subject.

It certainly looks like that 3-axis symbol. To confirm, I right-clicked the Project Base Point and selected Move to Internal Origin. Nothing appeared to have changed as a result, which seemed to confirm that both Survey Point and Project Base Point were at Internal Origin.

[syman2000]

Use wetransfer to upload file larger than 70Mb.

https://wetransfer.com/

[barthbradley]

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@_GT_ wrote:

Are you sure? This is an excerpt of the help file on this subject.

It certainly looks like that 3-axis symbol. To confirm, I right-clicked the Project Base Point and selected Move to Internal Origin. Nothing appeared to have changed as a result, which seemed to confirm that both Survey Point and Project Base Point were at Internal Origin.

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I'm sure of what I'm saying - just not sure of what I'm seeing in your screenshot. If it's the IO, then so be it.  I stand corrected.  Will I avoid jail time?  😉  

[_GT_]

Haha, you remain free. But only because you've been helpful thus far.

Autodesk site monitors: now would be the time to swoop in and deliver some technical wisdom, thereby facilitating the creation of a modest office background for zoom calls, which I expect is part of the company's 5-year plan.