Reference:Keywords

POV-Ray has a number of reserved keywords which are listed below.

a
aa_level aa_threshold abs absorption accuracy acos acosh adaptive adc_bailout global setting adc_bailout radiosity agate agate_turb albedo diffuse albedo phong	albedo specular all all_intersections alpha altitude always_sample ambient ambient_light angle aoi aperture append arc_angle area_illumination	area_light array asc ascii asin asinh assumed_gamma atan atan2 atand atanh autostop average

b
b_spline background bezier_spline bicubic_patch bits_per_color bitwise_and bitwise_or bitwise_xor black_hole blend_gamma color map blend_gamma pigment map blend_mode color map blend_mode pigment map blob	blue blur_samples bokeh bounded_by bounding bounding_method bounding_threshold box boxed bozo break brick brick_size brightness	brilliance bump_map bump_size bumps bt709 bump map bt709 height field bt709 image map bt709 image pattern bt2020 bump map bt2020 height field bt2020 image map bt2020 image pattern

c
camera case caustics ceil cells charset checker chr circular clipped_by clock clock_delta clock_on collect color color_map	colour colour_map component composite compression concat cone confidence conic_sweep conserve_energy contained_by continue_trace control0 control1 coords cos	cosh count crackle crand create_continue_trace_log create_ini cube cubic object cubic pattern cubic warp cubic_spline cubic_wave cutaway_textures cyclic_animation cylinder cylindrical

d
datetime debug debug_console debug_file declare default defined degrees density density_file density_map	dents deprecated df3 dictionary difference csg difference torus diffuse dimension_size dimensions direction disc	dispersion dispersion_samples display display_gamma dist_exp distance fog distance ovus dither dither_method div double_illuminate

e
eccentricity else elseif emission finish emission media end	end_column end_row error error_bound evaluate exp	expand_thresholds exponent exterior extinction

f
face_indices facets fade_color fade_colour fade_distance fade_power falloff falloff_angle false fatal_console fatal_error_command fatal_error_return fatal_file	fclose file_exists file_gamma filter final_clock final_frame finish fisheye flatness flip floor focal_point fog	fog_alt fog_offset fog_type fopen for form frame_number frame_step frequency fresnel function

g
gamma bump maps gamma heightfield gamma image map gamma image pattern gather	gif global global_lights global_settings gradient	granite gray gray_threshold grayscale_output green

h
height_field hexagon hf_gray_16	hierarchy high_reproducibility hollow	hypercomplex

i
if ifdef iff ifndef image_height image_map image_pattern image_width importance include	include_header initial_clock initial_frame input_file_name inside inside_vector int interior interior_texture internal	interpolate intersection csg intersection torus intervals inverse ior irid irid_wavelength isosurface

j
jitter jitter_amount	jpeg julia	julia_fractal

l
lambda lathe lemon leopard library_path light_group	light_source linear_spline linear_sweep ln load_file local directive	local dictionary location log look_at looks_like low_error_factor

m
macro magnet major_radius mandel map_type marble material material_map matrix max maximum_reuse max_extent	max_gradient max_image_buffer_memory max_intersections max_iteration max_sample max_trace max_trace_level media media_attenuation media_interaction merge csg merge torus	mesh mesh2 metallic method metric min min_extent minimum_reuse mixed mm_per_unit mod mortar

n
natural_spline nearest_count no no_bump_scale no_image	no_radiosity no_reflection no_shadow noise_generator normal	normal_indices normal_map normal_vectors now number_of_waves

o
object octaves off offset omega omnimax on	once onion open optional orient orientation orthographic	output_alpha output_file_name output_file_type output_to_file ovus

p
panoramic parallel parametric pass_through pattern pause_when_done pavement perspective pgm phase phong phong_size photons pi pigment pigment_map pigment_pattern	planar plane png point_at polarity poly polynomial poly_wave polygon post_frame_command post_scene_command post_frame_return post_scene_return pot potential pow ppm	precision julia precision ovus precompute premultiplied pretrace_end pretrace_start preview_end_size preview_start_size pre_frame_command pre_scene_command pre_frame_return pre_scene_return prism prod projected_through pwr

q
quadratic_spline quadric quality	quartic quaternion quick_color	quick_colour quilted

r
radial radians radiosity radiosity_file_name radiosity_from_file radiosity_to_file radiosity_vain_pretrace radius spotlight radius ovus rainbow ramp_wave rand range	ratio read reciprocal recursion_limit red reflection reflection_exponent refraction remove_bounds render render_block_size render_block_step render_console	render_file render_pattern repeat crackle pattern repeat warp rgb rgbf rgbft rgbt right ripples rotate roughness

s
samples media samples subsurface sampling_method save_file scale scallop_wave scattering seed select shadowless sin sine_wave sinh sint8 sint16be sint16le sint32be sint32le size sky sky_sphere slice slope slope_map	smooth smooth_triangle solid sor spacing specular sphere sphere_sweep spherical spiral1 spiral2 spline split_union split_unions spotlight spotted sqr sqrt square srgb bump maps srgb color literals srgb heightfield srgb image maps srgb image pattern	srgbf srgbt srgbft start_column start_row statistic_console statistic_file statistics stochastic_seed str strcmp strength strlen strlwr strupr sturm subset_end_frame subset_start_frame substr subsurface sum superellipsoid switch sys

t
t tan tanh target tau text texture texture_list texture_map tga thickness threshold blob	threshold isosurface threshold potential pattern tiff tightness tile2 tiles tiling tolerance toroidal torus trace transform	translate translucency transmit triangle triangle_wave triangular true ttf turb_depth turbulence type

u
u uint8 uint16be uint16le u_steps ultra_wide_angle undef union csg	union torus up use_alpha image pattern use_alpha finish use_color use_colour use_index user_abort_command	user_abort_return user_defined projection user_defined pattern utf8 uv_indices uv_mapping uv_vectors

v
v v_steps val variance vaxis_rotate	vcross vdot verbose version vertex_vectors	vlength vnormalize vrotate vstr vturbulence

w
warning warning_console warning_file warning_level warp	water_level waves while width wood	work_threads wrinkles write

x
x

y
y	yes

z
z