Yes you can.
You have to go to :
Plugins –> Kento3D –> Editor
You will find some Javascript right here.
Almost 50% down in this file you should find this part :
<script type=’text/javascript’>
var canvas = document.getElementById(‘cv’);
var viewer = new JSC3D.Viewer(canvas);
viewer.setParameter(‘SceneUrl’, ‘”.$atts[‘source’].”‘);
viewer.setParameter(‘InitRotationX’, -15);
viewer.setParameter(‘InitRotationY’, 135);
viewer.setParameter(‘InitRotationZ’, 0);
viewer.setParameter(‘ModelColor’, ‘#57524C’);
viewer.setParameter(‘BackgroundColor1’, ‘#383840’);
viewer.setParameter(‘BackgroundColor2’, ‘#000000’);
viewer.setParameter(‘RenderMode’, ‘texturesmooth’);
viewer.setParameter(‘MipMapping’, ‘on’);
viewer.init();
viewer.update();
</script>”;
You aim for this 2 parameters
viewer.setParameter(‘BackgroundColor1’, ‘#383840’); GREY
viewer.setParameter(‘BackgroundColor2’, ‘#000000’); BLACK
Just change the value of the parameters as you want.
In your example you want this 2 values here
viewer.setParameter(‘BackgroundColor1’, ‘#383840’); GREY
viewer.setParameter(‘BackgroundColor2’, ‘#ffffff’); WHITE
To be sure save the parts you change for a backup or whatever.
Hope i could help you.