There are many issues detected in my last 3D animation :
The exporter generated actions that are still attached to objects. Cleaning users
osg::clone(const T*, osg::CopyOp&) passed null object to clone, returning NULL.
Geometry 'vesicapiscis_1_1.003_0_frame_0067' tangents have been dropped_
Geometry 'vesicapiscis_1_1.004_0_frame_0000' tangents have been dropped_
Geometry 'petal4.0030_frame_0094' tangents have been dropped_
Geometry 'grouppetal1.004_0_frame_0053' tangents have been dropped_
Geometry 'petal40_frame_0020' tangents have been dropped_
Geometry 'vesicapiscis_2_1.001_0_frame_0038' has no normals_
Geometry 'object1.000_0_frame_0010' has no normals_
Geometry 'petal4.0050_frame_0064' has no normals_
Update material animations are not yet supported
Do you think that is the cause of the problem with the displacement mapping ?