Can anyone tell me if there is a way to tell the DL3 to not stretch images out of the native aspect ratio. It appears to do so by default and I don't see any way to change it. Thanks.
The DL graphics engine uses 3-D objects as a "canvas" for your media. The default object is a 4x3 rectangle.
You can use the X-Y-Z scale functions to change the "aspect".
Or render your content inside a 4x3 aspect raster with black or transparent in the "extra" areas around your image.
The best way is to build your own 3-D object to match the "aspect" you like.....there are some other 3-D objects near the end of the stock library of objects already as well.