points

Class

Shape

Synopsis
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points
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radius
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aspect
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rotation
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mode

Choose to render points as disk, spheres or quads.

min_pixel_width

If this value is non-zero, particles in points mode with a small on-screen width will be automatically enlarged so that they are at least the specified size in pixels. The enlargement fraction is then used in the particle shader to adjust the opacity so that the visible thickness of the particle remains the same. For a given number of AA samples, this makes it a lot easier to anti-alias very small particles, at the expense of render time (because of the additional transparency/depth complexity). Good values are in the range 0.2 to 0.7. Values closer to 0 are faster to render but need more AA samples. So if your scene already uses very high AA settings, you should use a low value like 0.1.

visibility

You can selectively disable an object's visibility for the various types of rays in the renderer. By default, objects are visible to all types of rays. Camera - Camera rays (i.e., primary or view rays). Shadow - Shadow rays fired in the direct lighting calculations. Reflected - Mirror reflection rays. Refracted - Refraction rays. Diffuse - Indirect diffuse rays (i.e. global illumination, hemi, or GI rays). Glossy - Indirect specular rays (i.e. glossy reflection rays).

sidedness

Just like you can disable the visibility for specific ray types, you can also change an object's sidedness depending on the ray type. By default, objects are double-sided for all rays. By unclicking any of these checkboxes, the object will become single-sided, which means that those parts of the object whose normal vector points away from the incoming ray direction will not be rendered.

receive_shadows

Determines whether or not the object picks up shadows from other objects.

self_shadows

Determines whether or not the object casts shadows on itself.


invert_normals

Invert normals (so that normals face inwards and not outwards).

ray_bias

Raytrace bias value specified for the object.

matrix

Transformation matrix. This can be either a single matrix or an array of matrices that define the SRT motion of the object for the current frame. (The matrices define the motion for the full frame, not just between the shutter open - close time.)

shader

An array of nodes pointing to the shader or shaders in the case of per-face shader assignment.

opaque

The opaqueness (transparency) of the object. By default all objects are marked as opaque, because that speeds up the rendering considerably. Note that this flag is not set automatically by adding a transparent material to the object, it has to be set manually!

use_light_group

A boolean to enable selective light linking

light_group

An array of nodes pointing to the lights that will affect the node if use_light_group is enabled.

use_shadow_group

A boolean to enable selective shadow linking.

shadow_group

An array of nodes pointing to the lights that will not cast shadows on the polymesh, if use_shadow_group is enabled.

trace_sets

An array of strings each of which names a trace set. A custom shader must be used to make an effective use of these strings via the AiShaderGlobalsSetTraceSet and the AiShaderGlobalsUnsetTraceSet API calls.

transform_time_samples

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deform_time_samples

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id

Unique ID for a node in the Arnold scene. 

 

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