backface_cull (boolean, default: on) controls whether or not the raytracer renders backfacing triangles.

gamma (float, default: 1.0) controls the gamma level applied to each pixel.

hash_max – see memory & performance

power (float, default: 1.0) controls how light is scattered.

ray_blend_blue (float, default: 0.14) controls blending of the blue component when blending colors.

ray_blend_colors (boolean, default: off) controls whether or not the raytracer blends oversaturated colors.

ray_blend_green (float, default: 0.25) controls blending of the green component when blending colors.

ray_blend_red (float, default: 0.17) controls blending of the red component when blending colors.

ray_clip_shadows (boolean, default: off) controls whether or not shadows take into account the front clipping plane.

ray_color_ramps (boolean, default: off) controls whether or not color ramps are sampled on a per-pixel basis for surfaces (as opposed to per-vertex).

ray_direct_shade (float, default: 0.0) controls whether or not shaded regions are still lit by the direct light eminating from the camera.

ray_hint_camera (float, default: 2.15) affects how the raytracer optimizes camera hash table sizes based on the average size of input primitives.

ray_hint_shadow (float, default: 0.65) affects how the raytracer optimizes shadow hash table sizes based on the average size of input primitives.

ray_improve_shadows (float, default: 0.10) controls how much the raytracer tries to extrapolate triangle coordinates in order to improve shadow appearance.

ray_interior_color (color, default: -1) controls the color of interiors in the raytracer.

ray_interior_mode (integer, default: 0) when set to 2, triangle-based (sphere or cartoon) interiors are ignored but not those of spheres (atoms) or cylinders (bonds).

ray_interior_reflect (float, default: 0.4) controls how reflective the interior surface is.

ray_interior_shadows (boolean, default: off) controls whether or not interior surfaces can be shadowed by geometry beyond the front clipping plane.

ray_interior_texture (integer: -1-5, default: -1) controls what texture (if any) is applied to the interior surface.

ray_label_specular (boolean, default: on) controls whether or not specular reflections apply to labels

ray_legacy_lighting (float: 0-1.0, default: 0.0) controls blending of the old legacy PyMOL lighting model.

ray_max_passes (integer, default: 25) controls how many passes the raytracer can make when dealing with transparent primitives.

ray_opaque_background (integer, default: -1) controls whether or not the raytracer background is opaque. If -1, then opaque_background controls.

ray_orthoscopic (integer, default: -1) controls whether or not the raytracer renders using an orthoscopic projection. If -1, then orthoscopic controls.

ray_oversample_cutoff (integer, default: 120) controls how different two adjacent pixels need to be in order to trigger oversampling when antialias is greater than 0.

ray_pixel_scale (float, default: 1.3) controls how the screen pixels size is scaled to a raytracer distance.

ray_shadow_decay_factor (float, default: 0.0) controls how fast shadows decay (0.0 = no decay).

ray_shadow_decay_range (float, default: 1.8) controls how far shadows must extend before they begin to decay.

ray_shadow_fudge (float, default: 0.001) is a tuning parameter that should not need to be modified.

ray_shadow (integer, default: 1) controls whether or not shadows are cast in the raytracer.

ray_texture (integer: 0-5, default: 0) controls what built-in texture (if any) is applied.

ray_texture_settings (vector, default: [ 0.1, 5.0, 1.0 ]) affects texture appearance.

ray_trace_color (color, default: -6) Controls the ray trace gain color. Ray trace gain is used when ray_trace_mode is set to 1.

ray_trace_depth_factor (float, default: 0.1) is a tuning parameter for ray_trace_modes 1-3.

ray_trace_disco_factor (float, default: 0.05) is a tuning parameter for ray_trace_modes 1-3.

ray_trace_fog (float, default: -1.0) controls fog density when raytracing. If -1.0, then the fog setting is used.

ray_trace_fog_start (float, default: -1.0) controls fog start when raytracing. If -1.0, then the fog_start setting is used.

ray_trace_frames – see states & movies

ray_trace_gain (float, default: 0.12) is a gain parameter for ray_trace_modes 1-3.

ray_trace_slope_factor (float, default: 0.6) is a tuning parameter for ray_trace_modes 1-3.

ray_transparency_contrast (float: 1.0-3.0, default: 1.0) can be used to boost the contrast of objects under transparent surfaces.

ray_transparency_oblique (float, default: 0.0) Controls whether PyMOL uses normal-based transparency for rendering surfaces. Since PyMOL 1.8 also supported with shaders.

ray_transparency_oblique_power (float, default: 1.0) Controls the strength of transparency for normal-based transparency when rendering surfaces. Requires ray_transparency_oblique setting to be enabled.

ray_transparency_shadows (boolean, default: on) controls whether or not transparency geometries cast shadows.

ray_transparency_spec_cut (float, default: 0.9) affects the strength of the specular effect on transparent surfaces.

ray_transparency_specular (float, default: 0.4) affects the strength of the specular effect on transparent surfaces.

ray_triangle_fudge (float, default: 0.0000001) is a tuning parameter that should not need to be modified.

spec_power (float, default: -1.0) controls the specularity power coefficient for the raytracer. If < 0.0, then shininess is used.

spec_reflect (float, default: -1.0) controls specularity intensity for the raytracer. If < 0.0, then specular_intensity is used.