AEM 3D supports image-based lighting (IBL) for both interactive viewing and rendering with the built-in Adobe Rapid Refine™ renderer and third-party renderers. You can create IBL stages with common authoring tools such as Autodesk® Maya® or Autodesk® 3ds Max®.
Images used for image-based lighting should have HDR (High Dynamic Range) for best results. They must be in lat/long format with spherical mapping providing full coverage of the environment.
Currently, AEM 3D only supports 32-bit TIFFs. If necessary, use Adobe Photoshop or a similar tool to convert the HDR image to a TIFF using the following settings in the Adobe Photoshop TIFF Export dialog box:
While a single HDR image is often sufficient for IBL stages, AEM 3D provides additional control over IBL effects by allowing up to three separate images:
The conversion algorithm may have difficulty with certain IBL images. This difficulty can result in backgrounds that are too bright or overly saturated in Preview or when rendering with Rapid Refine. In such situations, Adobe recommends that you use Photoshop or a similar tool to manually convert the IBL image to an 8-bit RGB image. Upload this image separately and attach it to the stage as the Background Environment Image. The Diffuse Lighting and Reflection Environment images must always be 32-bit TIFFs.
You can fine-tune the appearance of the IBL stage with the following stage properties:
|IBL Sun Details||
Lets you adjust the direction and strength of the supplemental light source that simulates the sun. This light source increases the lighting brightness and causes the object to cast a drop-shadow onto the ground plane. Shadow casting is supported when rendering with Rapid Refine and for previewing with Google Chrome; however, it is currently not supported by other browsers.
|IBL Camera Height||If the IBL background appears distorted near the horizon, it is possible to reduce or eliminate the distortion by adjusting this property.
Lets you control the diffuse lighting. You may need to adjust this property manually to correct the lighting brightness if the Diffuse Lighting Environment Image is unusually bright or dark (for example, night scenes).
IBL stages use spherical background images that are 20 meters diameter by default. Such stages work well for objects up to 10 meters. However, if you are showing larger objects, you can increase the spherical background diameter of an IBL stage.
To increase the spherical background diameter of an IBL stage:
In CRXDE Lite, navigate to the stage whose spherical background diameter you want to increase. For example,
Expand the stage node to
Set the property
dam:gPlaneRadius to the desired millimeter value.
For rendering efficiency, Adobe recommends that you limit this value to approximately the largest dimension of the largest object that you intend to shown on the stage.
For example, a jet plane model that is 20 meters long displays well if
Near the upper-left corner of the CRXDE Lite page, tap Save All.