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Description
A OpenCL computationally challenging Settings / Params.

Mandelbulber 2.25 OpenCL Multi-GPU rendering
Fractal formula: Pseudo Kleinian - Mod 4 + T>Blockify

Post processing in PS

A fairly intricate fractal rendered with a semi-transparent glass-like material.
Despite some optimizations (I'm not very experienced), calculating transparencies in the densest parts of the fractal is time-consuming to the point where compromises are necessary.

Optimization attempt:

Max number of iterations 250 > 125
Max view distance set as needed
Set a bounding box In an attempt to exclude from calculations everything under the floor
I left the Ray-traced reflections and transparency parameter at 5 because a lower value would affect too much the quality of transparencies.

Using the settings above I have not found a substantial improvement so I rendered without MC with acceptable rendering time of about 6h at 3840x2160 AA=45 but with less overall details quality in the output image.

If any of you with more experience has advice on how to optimize / speed up the settings, I would be happy to learn, thanking in advance!

# Mandelbulber settings file
# version 2.25
# only modified parameters
[description]
- www.deviantart.com/md55dm/gall…
[main_parameters]
abs_max_marching_step 1.5;
all_primitives_invisible_alpha true;
ambient_occlusion_mode 1;
ambient_occlusion_quality 8;
antialiasing_enabled true;
antialiasing_ocl_depth 2;
background_3_colors_enable false;
background_color_1 7b00 7900 6c00;
background_rotation 17.5 -10 0;
camera 29.9868908734557 -27.9593733540435 12.2197129854826;
camera_distance_to_target 43.0640644387297;
camera_rotation 49.280193165707 -15.672361143166 0;
camera_top -0.204738485999719 0.17622605661311 0.96282216910556;
DE_factor 0.25;
DE_thresh 0.00911340245061708;
detail_level 2;
detail_size_max 0.5;
DOF_MC_global_illumination true;
DOF_monte_carlo true;
file_background ;
file_envmap ;
file_lightmap ;
flight_last_to_render 0;
formula_1 217;
formula_2 1085;
formula_material_id 3;
formula_repeat_8 0.114 0.476 -0.3465;
formula_rotation_3 -66.8 -59.35 -53.85;
formula_scale_6 1.22885318657851;
formula_stop_iteration_2 1;
fov 10;
fractal_enable_6 false;
fractal_enable_9 false;
fractal_rotation -1 -3.5 -1;
glow_enabled false;
hybrid_fractal_enable true;
image_height 1080;
image_proportion 4;
image_width 1920;
julia_c_3 0.428 0.034 -0.161;
julia_mode_3 true;
keyframe_last_to_render 0;
light1_intensity 0.7;
light1_is_defined true;
light1_rotation -50 60 0;
light1_soft_shadow_cone 5;
limit_max 116.845711435717 116.941074374177 14.0520203753449;
limit_min -116.845711435717 -116.350919137274 -1.3;
limits_enabled true;
mat2_fresnel_reflectance true;
mat2_is_defined true;
mat2_luminosity_color f600 f200 d800;
mat2_metallic false;
mat2_name Floor;
mat2_reflectance 0.35;
mat2_reflections_color f600 f200 d800;
mat2_specular 1;
mat2_specular_color f600 f200 d800;
mat2_specular_width 1;
mat2_surface_color af00 ac00 9a00;
mat2_surface_color_gradient 0 fd6029 999 698403 1999 fff59b 2999 f5bd22 3999 0b5e87 5000 c68876 5999 a51c64 7000 3b9fee 7999 d4ffd4 9000 aba53c;
mat2_use_colors_from_palette false;
mat3_fresnel_reflectance true;
mat3_is_defined true;
mat3_metallic false;
mat3_name Fractal;
mat3_reflectance 0.5;
mat3_rough_surface true;
mat3_specular 20;
mat3_specular_width 0.035;
mat3_surface_color ff00 f600 aa00;
mat3_transparency_color fb00 ff00 f900;
mat3_transparency_interior_color ff00 ff00 ff00;
mat3_transparency_of_surface 0.95;
mat3_use_colors_from_palette false;
MC_GI_radiance_limit 5;
MC_soft_shadows_enable true;
N 125;
primitive_plane_1_enabled true;
primitive_plane_1_material_id 2;
primitive_plane_1_position 0 0 -1.25;
raytraced_reflections true;
rel_max_marching_step 5000;
target -1.43831159246334 -0.910528669097003 0.586557903188774;
view_distance_max 150;
[fractal_1]
transf_addition_constantP_000 -0.300291 -0.197903 -3.828247;
transf_function_enabledAx_false true;
transf_function_enabledBx false;
transf_function_enabledBx_false true;
transf_function_enabledN_false true;
transf_function_enabledx_false true;
transf_function_enabledy_false true;
transf_minimum_radius_05 0.581527;
transf_offset_000 0.808351 0.0481 0.0305;
transf_offsetA_0 0.064925;
transf_scaleA_1 2.440619;
transf_scaleG_1 0.880035;
transf_sphere_inversion_enabled_false true;
transf_start_iterations_N 2;
transf_stop_iterations_O 251;
[fractal_2]
transf_function_enabled_false true;
transf_function_enabledCx false;
transf_function_enabledCy false;
transf_function_enabledCz false;
transf_function_enabledR_false true;
transf_scale 3;
transf_scale_1 2.070752;

Description
A OpenCL computationally challenging Settings / Params.

Mandelbulber 2.25 OpenCL Multi-GPU rendering
Fractal formula: Pseudo Kleinian - Mod 4 + T>Blockify

Post processing in PS

A fairly intricate fractal rendered with a semi-transparent glass-like material.
Despite some optimizations (I'm not very experienced), calculating transparencies in the densest parts of the fractal is time-consuming to the point where compromises are necessary.

Optimization attempt:

Max number of iterations 250 > 125
Max view distance set as needed
Set a bounding box In an attempt to exclude from calculations everything under the floor
I left the Ray-traced reflections and transparency parameter at 5 because a lower value would affect too much the quality of transparencies.

Using the settings above I have not found a substantial improvement so I rendered without MC with acceptable rendering time of about 6h at 3840x2160 AA=45 but with less overall details quality in the output image.

If any of you with more experience has advice on how to optimize / speed up the settings, I would be happy to learn, thanking in advance!

# Mandelbulber settings file
# version 2.25
# only modified parameters
[description]
- www.deviantart.com/md55dm/gall…
[main_parameters]
abs_max_marching_step 1.5;
all_primitives_invisible_alpha true;
ambient_occlusion_mode 1;
ambient_occlusion_quality 8;
antialiasing_enabled true;
antialiasing_ocl_depth 2;
background_3_colors_enable false;
background_color_1 7b00 7900 6c00;
background_rotation 17.5 -10 0;
camera 29.9868908734557 -27.9593733540435 12.2197129854826;
camera_distance_to_target 43.0640644387297;
camera_rotation 49.280193165707 -15.672361143166 0;
camera_top -0.204738485999719 0.17622605661311 0.96282216910556;
DE_factor 0.25;
DE_thresh 0.00911340245061708;
detail_level 2;
detail_size_max 0.5;
DOF_MC_global_illumination true;
DOF_monte_carlo true;
file_background ;
file_envmap ;
file_lightmap ;
flight_last_to_render 0;
formula_1 217;
formula_2 1085;
formula_material_id 3;
formula_repeat_8 0.114 0.476 -0.3465;
formula_rotation_3 -66.8 -59.35 -53.85;
formula_scale_6 1.22885318657851;
formula_stop_iteration_2 1;
fov 10;
fractal_enable_6 false;
fractal_enable_9 false;
fractal_rotation -1 -3.5 -1;
glow_enabled false;
hybrid_fractal_enable true;
image_height 1080;
image_proportion 4;
image_width 1920;
julia_c_3 0.428 0.034 -0.161;
julia_mode_3 true;
keyframe_last_to_render 0;
light1_intensity 0.7;
light1_is_defined true;
light1_rotation -50 60 0;
light1_soft_shadow_cone 5;
limit_max 116.845711435717 116.941074374177 14.0520203753449;
limit_min -116.845711435717 -116.350919137274 -1.3;
limits_enabled true;
mat2_fresnel_reflectance true;
mat2_is_defined true;
mat2_luminosity_color f600 f200 d800;
mat2_metallic false;
mat2_name Floor;
mat2_reflectance 0.35;
mat2_reflections_color f600 f200 d800;
mat2_specular 1;
mat2_specular_color f600 f200 d800;
mat2_specular_width 1;
mat2_surface_color af00 ac00 9a00;
mat2_surface_color_gradient 0 fd6029 999 698403 1999 fff59b 2999 f5bd22 3999 0b5e87 5000 c68876 5999 a51c64 7000 3b9fee 7999 d4ffd4 9000 aba53c;
mat2_use_colors_from_palette false;
mat3_fresnel_reflectance true;
mat3_is_defined true;
mat3_metallic false;
mat3_name Fractal;
mat3_reflectance 0.5;
mat3_rough_surface true;
mat3_specular 20;
mat3_specular_width 0.035;
mat3_surface_color ff00 f600 aa00;
mat3_transparency_color fb00 ff00 f900;
mat3_transparency_interior_color ff00 ff00 ff00;
mat3_transparency_of_surface 0.95;
mat3_use_colors_from_palette false;
MC_GI_radiance_limit 5;
MC_soft_shadows_enable true;
N 125;
primitive_plane_1_enabled true;
primitive_plane_1_material_id 2;
primitive_plane_1_position 0 0 -1.25;
raytraced_reflections true;
rel_max_marching_step 5000;
target -1.43831159246334 -0.910528669097003 0.586557903188774;
view_distance_max 150;
[fractal_1]
transf_addition_constantP_000 -0.300291 -0.197903 -3.828247;
transf_function_enabledAx_false true;
transf_function_enabledBx false;
transf_function_enabledBx_false true;
transf_function_enabledN_false true;
transf_function_enabledx_false true;
transf_function_enabledy_false true;
transf_minimum_radius_05 0.581527;
transf_offset_000 0.808351 0.0481 0.0305;
transf_offsetA_0 0.064925;
transf_scaleA_1 2.440619;
transf_scaleG_1 0.880035;
transf_sphere_inversion_enabled_false true;
transf_start_iterations_N 2;
transf_stop_iterations_O 251;
[fractal_2]
transf_function_enabled_false true;
transf_function_enabledCx false;
transf_function_enabledCy false;
transf_function_enabledCz false;
transf_function_enabledR_false true;
transf_scale 3;
transf_scale_1 2.070752;