FAQ - Frequently Ask Questions


This page sumarize frequent questions and common problems in ARcrowd for our users. Press the problem that you want to read to see a full description of it.

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  You might be interested on visit our Technical guide for 3d models in ARcrowd
ARcrowd is based on HTML5 and file formats are provided by this standard.

File types currently supported in ARcrowd are:
  • Image: JPG, JPEG, PNG, BMP and GIF.
  • Sound: MP3.
  • Video: MP4.
  • 3D models: DAE (previously compressed in ZIP).
Uploaded files can be 64 Mb maximum. This will be applied to every kind of file: images, sounds, videos and 3D models in ZIP format.
ARcrowd support 3D models in DAE format. We had checked exported DAE models with OpenCollada plugin for 3DS Max Studio, and they work in their majority. We can't know if a model in DAE format will be visualized correctly a priori. Models can't be uploaded directly; you have to compress them even if they don't contain textures.

Sketchup users: models exported directly to DAE using Sketchup (free or PRO version) could not be displayed correctly.

If you have any doubts with your 3D models, send us a message and we will help you.
3D models should be composed by a base file and one or multiple texture files. These textures can be in the same directory or in a different folder (it has to be correctly linked into model file). To upload 3D models we will proced in the following way:

1. Move all the files belongs to model to an unique folder. It only be neccesary the DAE file and textures exported (we don't need any other files, like .blend, .skp, etc).

s1
2. Select all these files and use a compression program to create a ZIP. In this example, we used a freeware compression program called 7-Zip (http://www.7-zip.org/).

s2
3. Resulted file will contain a DAE file in the root, and can also contain one or more texture folders.

s3
4. This ZIP file is ready to be uploaded to ARcrowd.
Los modelos 3D se ven sin texturas
If your 3D models render well but without textures, the problem is that your DAE file is trying to load its textures directly from your PC, or its texture files have unsupported formats.

We should assure that texture files are correct. Texture file formats currently supported are JPG, JPEG and BMP. If you have any texture of other format like GIF, DDS or TIFF, change its extension using any image editor like GIMP or Adobe Photoshop.

Important You have to assign again these new texture files using your 3d model program

If these files are correct, maybe their paths are incorrectly linked. There are two possible solutions for this problem: using OpenCollada plugin or editing your DAE file with a text editor.

OpenCollada plugin
Los modelos 3D se ven sin texturas
Before you export your model using OpenCollada, be sure to check "Relative Paths" and "Copy Images" options. "Relative Paths" allows your DAE file to load its textures from right paths and "Copy Images" option create a copy of all your textures and put them into a folder called images. We recommend to check both.

DAE file
Another solution is to edit the DAE file directly using text editors like Notepad for Windows, Notepad++, GEdit, Vi, etc. Try to do the following:
1. Open the file with one of these editors and look for lines where it uses texture files (you can search by ".JPG" or ".JPEG" using Ctrl+F or Ctrl+B keys).
2. Modify the line with this aspect:
<init_from>file:///C:/Users/arcrowd/Documents/3dsMax/export/images/textura.jpg</init_from>
And change it for this:
<init_from>./images/textura.jpg</init_from>
The texture now will be loaded sucessfully from "images" folder, that should contain the texture file and must be in the same folder that your DAE file. Remember that you should do the same with every single texture used by your 3D model.
We have some limits refers to 3D models supported by our platform. If your 3D model renders slow, or the viewer blocks, must be due to your model quality.

We recommend not to use complex 3D models. By general, models without compression about 10Mb should be complex to render in ARcrowd.
My ARbook shows an error message in viewer, previewer and library. Why?
On ARbook creation, transition between step 2 and step 3 is priceless. If you find this message in your ARbook, this transition went wrong. This problem occurs when user exit when generating message is displaying on screen. As a consequence, ARbook do not create correctly and viewer/preview will not show content properly.

In order to avoid this situation, we recommend you to wait until step 2 finish when you click on "Generate ARbook" button. If you find this message and want us to fix it, send us a message.
Arcrowd's viewer and previewer are not compatible with Internet Explorer in any version. Internet Explorer currently does not support WebRTC and it is not possible to get multimedia sources such as webcams or microphones directly from browser.

Our suggestion is to use Google Chrome or Mozilla Firefox. Both support WebRTC completely and it is possible to enjoy our viewer and previewer without any issues.
In ARcrowd we use HTML5 and a couple of associated techonologies (like WebRTC) to provide a full web viewer. If you find this message in your viewer, your current browser doesn't support getUserMedia API. This API provides methods to access to your multimedia devices directly from your browser. If we cannot access to them, you won't be able to use Augmented Reality with us.

Our suggestion is to use Google Chrome or Mozilla Firefox. Both support WebRTC completely and it is possible to enjoy our viewer without any issues.
One of our technologies involves WebGL. WebGL allow us to overlay your marker's content into webcam streaming to create Augmented Reality. This message can be showed in browsers without WebGL compatibility (you can check if your browser is compatible using this website) or browsers with WebGL deactivated.

To activate WebGL in Google Chrome:
  1. Open a new tab and type "chrome://flags" (no quotes)
  2. Look for an option called "Deactivate WebGL" (use Ctrl+F keys for faster search) and check if its row is grey.
  3. Otherwise, click on "Disabled" and reboot your browser.

To activate WebGL in Mozilla Firefox:
  1. Open a new tab, type "about:config" (no quotes) and accept the warning.
  2. Look for an option called "webgl.disabled" (use searcher) and check if its value is equal to false
  3. Otherwise, double click on it (its value will change to true) or right click and press Modify, and reboot your browser.
We are not currently capable of doing Augmented Reality process in all available browsers. Due to technology, ARcrowd works on last versions of Google Chrome and Mozilla Firefox. Upgrade it to its last version, or download them from the following links: