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Maxwell Render 2.5 User Manual

Chapter 9. The core rendering application | 45

9.02.04 Globals

This checkboxes allow you to easily disable/enable the Motion Blur, Displacement and

Dispersion calculations on your render, without the need of editing the scene or its

materials.

9.02.05 Channels

Several render channels are available, useful for compositing tasks. The output will be

saved in the same directory as set in the Output options.

• Channels: Allow you to determine if you want your channels to be

exported as independent les (Separate), or embedded in one single le

(Embedded) in the formats that allow extra buffers, like exr or tif. The

Alpha channel can be embedded in the tga, png, tiff and exr formats.

• Render: Output the main render image. You can choose between three main render

types.

• Diffuse+Reections: Which is the usual complete render. Output the whole

render including diffuse and reections.

• Diffuse: Output and imagen containing only the diffuse color of the surfaces.

• Reection: Output an image containing only the reective component of the

surfaces.

• Alpha: Output the alpha channel. The alpha channel is a black & white image

containing information about where a specic object exists and where it does not. It

is useful as a clipping mask when you want to isolate an object and composite it with

another object (for example: clipping a car render and pasting it over a photograph).

It is also possible to render a completely white alpha for transparent objects with the

Opaque option. If this option is unchecked, transparent materials will render with a

transparent alpha.

• Z-buffer: Output an image representing scene depth within the two values specied

in the Z-buffer range. The range is in meters. For common usage, you should specify

the range from the camera to the farthest object in your scene. This is useful to create

a depth of eld effect as a post process in an image editor that can use a Z-buffer

image to extract depth info.

• Shadow: Output a shadow channel. This channel is a grayscale image that represents

the shadows received by objects that have a material applied to them with the “Matte

Shadow” option turned on. This is useful to composite the shadows cast by a rendered

object into a photograph. The “Matte Shadow” option must be enabled for the desired

shadow-catching material. This can be done in the Material Editor of the specic

material (see chapter about Materials).

Note:

Multishadow

: If the Multilight feature is enabled, Maxwell exports all the shadow

buffers corresponding to each individual light emitter separately during the same render

process, giving you an extraordinary control over the composition during the post-production

process.

• Material ID: Output multicolored material silhouettes. This is useful for easier

selections in a 2D image editor when you want to edit only specic materials in the

rendered image.

• Object ID: Output multicolored object silhouettes. This is useful for easier selections

in a 2D image editor when you want to edit only specic objects in the rendered

image.

• Motion Vector: Output the x,y,z translation of each pixel. Useful to apply motion

blur in compositing as a post process.

• Roughness: Output an image containing the Roughness value of the materials in the

scene. High Roughness materials will appear white in the image, while low Roughness

materials will appear dark.

• Fresnel: Output an image containing the Fresnel information of the surfaces.

During the render, you can display the specic render channels that you’ve requested by

hovering over the channel buttons in the render view.

To switch the channel displayed, it is enough to hover over the channel button instead of

clicking it.

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