blue grot
http://www.fractalforums.com/index.php?action=gallery;sa=view;id=7731still have fun exploring the basement floor.
be aware, that this parameter doesn't contain colors, so it might look ridiculous.

image and parameter of "blue grot" under Creative Commons Attribution-NonCommercial 3.0 Unported License
http://creativecommons.org/licenses/by-nc/3.0/Mandelbulber 1.04;
image_width 2304;
image_height 1440;
view_point_x -2.2656542726287441;
view_point_y -2.1441283079260871;
view_point_z 1.9293975161342889;
angle_alfa 106.78615639856309;
angle_beta -24.786817734015301;
angle_gamma -155;
zoom 0.0015;
perspective 0.90000000000000002;
formula 8;
power 2;
N 255;
fractal_constant_factor -0.78700000000000003;
DE_factor 1.5;
brightness 0.80000000000000004;
shadows_intensity 2;
ambient_occlusion 0.20000000000000001;
ambient_occlusion_quality 3;
specular 0;
glow_intensity 0.69999999999999996;
glow_color_1_R 0;
glow_color_1_G 35765;
glow_color_1_B 65535;
glow_color_2_R 0;
glow_color_2_G 65535;
glow_color_2_B 48504;
background_color_1_R 65535;
background_color_1_G 51968;
background_color_1_B 34596;
background_color_2_R 49582;
background_color_2_G 26523;
background_color_2_B 26523;
coloring_random_seed 23423;
coloring_speed 1;
coloring_palette_offset 241.5;
post_fog_visibility 5;
post_fog_visibility_front 20;
post_fog_color_R 65535;
post_fog_color_G 65535;
post_SSAO_quality 26;
post_DOF_focus 22;
main_light_alfa -2.2689280275926285;
main_light_beta 0.69813170079773179;
main_light_colour_G 61670;
main_light_colour_B 45874;
mandelbox_scale -1.1499999999999999;
mandelbox_folding_min_radius 0.40000000000000002;
mandelbox_rotation_main_alfa 13;
mandelbox_rotation_main_beta 5;
mandelbox_rotation_main_gamma 4;
mandelbox_color_X 0.10000000000000001;
mandelbox_color_Y 0.10000000000000001;
mandelbox_color_Z 0;
mandelbox_color_Sp2 0;
volumetric_light_quality 2;
volumetric_light_intensity_0 7000;
volumetric_light_enabled_0 1;