This is my original 3D scene, created by Maya, the main trees are animated and driven by bones, the grass is not animated in order to save system resources, and the grass is generated by the Maya Mash system.
The promotional image is rendered by Maya Redshift 3.5.16. The redshift version has lights, and the rendered effect is the same as the preview image.
-The Maya Scanline version has no lights.
-Since the generic FBX version does not support the MAYA MASH plugin, the FBX version does not have MASH generated grass.
-Because OBJ does not support skeletal animation and MASH system, the OBJ version does not have the animation of grass and main trees generated by MASH.