I created a support case regarding the old skies (dawn, noon etc etc) and they are not available directly as they were in 2014 but can be "kind of used".
The workaround is as follows - kudos to Nicolas Menu at Autodesk Support for this:
There is a workaround to get your old skies back...
Open your model, open the JavaScript console, copy, paste and run this little script...
Setting the SykType to a value of 1 and knowing the correct SkyTextureFileName will switch to the other old sky types; a value of 2 sets the old default sky and s value of 0 will completely remove the sky. After changing the parameter SkyType you have to close and re-open your model, but the script does this for you.
var citymodel = app.ActiveModel;
citymodel.SkyType=3;
citymodel.SkyTextureFileName="";
var modelUri=citymodel.ModelUri;
app.CloseDocument();
app.OpenDocument(modelUri);
Example to display your model with the Dawn sky
(located in : C:\ProgramData\Autodesk\InfraWorks\Resources\materials\Sky)
var citymodel = app.ActiveModel;
citymodel.SkyType=1;
citymodel.SkyTextureFileName=":/Resources/Dawn.dds";
var modelUri=citymodel.ModelUri;
app.CloseDocument();
app.OpenDocument(modelUri);
neilyj (No connection with Autodesk other than using the products in the real world)
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Hi @neilyj666
the procedure you are talking of is also described in the Autodesk Knowledge Articles:
http://knowledge.autodesk.com/article/How-to-get-InfraWorks-2014-Sky-Options-and-styles-in-2015
With the introduction of Design Views in InfraWorks 2017.2 the workaround via JavaScript does not work anymore.
If you want the old sky option back I suggest to post it on the InfraWorks Ideas pages: http://forums.autodesk.com/t5/infraworks-360-ideas/idb-p/129/tab/most-recent
Regards,
Karsten.