Posted by questioning on Sep 01, 2022; 11:07am
URL: https://forum.jogamp.org/shadows-are-lost-while-Java3D-1-5-2-to-1-7-0-migration-tp4041834p4041837.html

the solution is to use values in range [0.0f; 1.0f] for a color,
for Java3D 1.7.0 Color3f(255, 0 , 0) is not acceptable, the better way is to replace it with Color3f(0.75f, 0 , 0)

PS @philjord thanks for your time