I think the best wrapper for RTCW it's QEffects PRO 1.0, and it's perfect for all id software's games! Not these convertors that deletes part of original effects ingame. In mine looks bugged.
In free time I love watch new interesting places, and today I "googled" a beautiful palace: Charlottenburg palace in Berlin. I thinked immeditely to RTCW chateau level.. So I thinked why don't get suggestions for retexture? Or just link some pictures.
Probably texture artists of Return to Castle Wolfenstein taken some pics from that place to use in Chateau level. Look the effect of wallpaper that I simulated with a special shader in my mod. I think Berserker engine can simulate that really better with perpixel lighting, and not only using height map and bumpmapping making all the textures really "plastic" as they are doing.. but simply using specular mapping ( in Venom mod I used a single stage shader for that but it's older code). And I understand it's an insane work, too much work to do for every texture with a new engine.
in this you can see the default floor decoration, more clear here.
and there a similar wallpaper of the game (from Schloss Eckartsau)
Also some interior stonewalls from first two levels probably taken from prison of Wewelsburg castle near Paderborn and other stoner castles. But I don't know if "Remake mod" members reads this forum.