How to rotate an HDRI image?
When using both the native 3ds Max Bitmap node or Corona Bitmap node, the procedure is identical:
Use "U Offset" value for this.
1 = 360 degrees
0,5 = 180 degrees
0,25 = 90 degrees
You can also use a Rotation [degree] value - these parameters are interdependent.
Note: entering full numbers into the U Offset will not introduce any change into the scene, as the HDRI will be always rotated by 360 degrees. Interactive rendering is very useful for determining the desired HDRI rotation.