Revit Lighting Analysis Error & Questions

[Anonymous]

Hi,

I am working on a office building daylighting analysis. I have turned off all the mass and extra model elements in the project _lighting analysis model 3d view. I am still getting an error 'failed to export document to SPD. SPD export failed. Check you permissions.' Can you please help us understand the issue ?

I do have other questions on revit lighting design plugin.

a) We have a double pane glass as per project specifications. In the revit file the glass is only modeled as a single pane for simplicity. I would like to know can we still peform daylight simulation just by changing the RGB values as per steps below (see link below) or do we have to model a double pane glass in the revit file first and follow these steps afterwards ?

http://help.autodesk.com/view/BUILDING_PERFORMANCE_ANALYSIS/ENU/?guid=GUID-5734F60C-2D58-4D61-B0E4-0...

b) We ran a daylight simulation on a previous project and had some issues. We only wanted to analyse few spaces on different floors in a multistory office building. How can we hide the analysis grid after the simulation is complete ?  We noticed the section box does not hide or isolate the analysis grid on different floors.

c) Is there a way to change the analysis grid size from 10 feet by 10 feet to a different number ? This will help us analyze some non LEED projects.

d) How can we place an analysis grid on a vertical surface  like wall, etc ?

e) Is it possible to view  foot candel levels on the analysis grid. See attached image from radiance ?

We appreciate your help.

Regards

Sushant Verma

sushant_verma@gensler.com

[scheerd]

hello.

Apologies for the long delay getting back to you, this message didn't get to me through the normal channels.

The SPD export issue is normally a problem with the model or a network problem.  Try running a rendering through View>RenderInCloud (small ones are free) and this will use the same SPD exporter and tell you if it's a problem with the model or not.

a. Modeling a single pane is the best way to go in Revit, and it is what 99% of models use.  We provide the double pane description in case users have windows built in detail.  Be sure to use the RGB definition for how the glass is modeled in Revit rather than the actual specified makeup.  1" (25.4mm) is the usual default modeling for glass.  Apologies for the complexity of this, it's a Revit thing we are stuck with for now.

b. Analysis grids are created from all Floor objects, and you can select floors to analyze based on the Level they are associated with.  When viewing results in the 3d view, you can click on the rendered results and change the properties to hide certain levels (you can also choose to see 9am or 3pm results in that dialog), or you can get to this in the 3d view properties through the Analysis Display Settings dialog after Generate Results.  You can also change units shown in the legend in those dialog or change the Analysis Display (AVF) Style.

c. The only choice for grid size are 'Low' or 'High'.  This will change the price also when running an analysis.  Low resolution runs a 1' grid and displays a sampled 6' grid.  High resolution runs a 3" grid and displays a 1' grid.  Changing the Analysis Display Style to a Points style will allow you to see the raw points with optional value annotation.

d. Vertical grids are not an option right now.  It's something we would like to add.  Can you describe the analysis you want to do on vertical planes?  One way to get Illuminance results on all Revit model surfaces is to use the View>RenderInCloud tool with the Illuminance output type.  This will create a still image of any camera or 3d view with Illuminance values.  It won't import into the Revit model, but the image may still be useful.

e. see c.  If you choose fc for the units and a points style with annotation, you will see the raw points with values for the resolution of the analysis.

[Anonymous]

Hi, 

I just downloaded the lighting plugin for revit 2016, installed it with my id and when I run the simmulation a note pops up that says "Can`t reach the rendering service. The daylighting server may be unavailable. please try again later".

Do you know what may be the problem?

[stephanie.egger]

Hi @Anonymous,

I just checked and the lighting analysis rendering service is working as expected. Do you have a secure internet connection? This error sounds like the connection might have been interrupted while Revit was trying to upload your model to the rendering service.

-Stephanie

[Anonymous]

I'm also having the same error as user above : Can't reach the rendering service. The daylighting server may be unavailable. PLease try again later. What next?

[Anonymous]

Smodla, I fixed it going to the render cloud and login in with my user. Hope that it works for you too.

[Anonymous]

Hi,

Iam working on a two floor building, and while running the day lighting analysis results are only being displayed for first floor neglecting the ground floor. and even while opting only for the ground floor, error msg. occurs stating - "your project has no rooms included in day lighting analysis. " the parameter for include in day lighting is checked" for all the rooms at ground floor. But still ground floor is not being accounted in the analysis. please get back soon.

[stephanie.egger]

Is it possible the floors for your ground level are modeled with an element different from actual floor elements? Also check that rooms are physically placed in your model.

-Stephanie

[Anonymous]

Hi!

I generated the results for my LEED V4 op 2 and the lighting analysis floor plan seems ok. However, I can't find the legend bar anywhere (I did not delete it). Apparently it was not automatically generated. Is there a way that I can generate a legend from the results? Thanks.

[mstein7484]

Hi @Anonymous

Try changing the Graphics View Scale in the View properties menu. You may need to zoom out of the view as well.

Let us know if you have more questions on this topic, otherwise please accept as a solution so that others can benefit from this information.

Regards,

[Anonymous]

thank you!

[rds3000]

• Failed to export
  Hard to say without seeing the model.  This is very rare.  Feel free to send the model to support.
  I assume this happens consistently for the model?
  Also helpful is to see the log file from C:\Autodesk\RevitDaylighting.  If that folder doesn't exist on your computer, create it manually and try to run the analysis again.  A log file should be created that will tell us what processes succeeded and failed.
  
  
• Modeling glass:
  A single pane model is definitely easier and is used 99% of the time.  The same RGB technique is used for single or double. 
  Please see this post for more info:
  https://forums.autodesk.com/t5/lighting-solar-analysis-forum/lar-workflows-tricks-and-tips-post-2/td...
  
  
• Analysis grid visibility:
  AVF does not respect section box, so we provided a checkbox in the Analysis Results Properties.
  Select the Analysis Results surface.
  In the Properties panel, select the Edit button in Results Visibility.
  Each level has a separate Analysis Results Schema in the list, and a Visible checkbox.  Uncheck levels you are not interested in.
  Note: In the Properties, you can also choose other results to display using the Analysis Configuration dropdown, choose units, format the Legend, and define different Styles to each Schema layer.
  
  
• Grid size:
  The only options for now are 12" and 72" for some analysis types, or defaults of 24" for sDA and 12" for Solar Access.  We've had requests to provide custom grid sizes, but it's a difficult feature to implement, as it intersects the cloud costing and display and results management.
  If you have some specific requirements for your regulatory agencies, let us know the standards, and we may add some other variations.
  
  
• Vertical surface analysis:
  This is currently not possible with Insight Lighting.  There are however some capabilities in Dynamo for Lighting analysis that allow you to define any analysis plane orientation.  Analysis point grids are defined with 3 corner points and a grid resolution.
  
  
• Footcandle units:
  As mentioned above, you can change the units for the Legend and Points to FC using the Analysis Results Properties panels.

[Anonymous]

Hi Sushant, did you ever find a solution to this? Currently encountering the same issue on a project I am working on.

[rds3000]

If your issue is with results for a Level not being shown in Plan view, it's likely that your Rooms are not associated with the same Level as the Floor, which is what generates the analysis points, or your InsightLighting Model View and the Room and/or the Plan View have different Phases.

d

[Anonymous]

Hi currently getting this error message.

[rds3000]

Would have to see the model.

Can you send it to david.scheer@autodesk.com?

d