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Foundry ships Mari 5.0 | CGBucket

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Originally posted on 7 October 2021 on the release of the public beta, and updated for the final release.

Foundry has released Mari 5.0, the next major version of its 3D texture painting software.

Key changes include support for Python 3.7, a new USD-based workflow for exporting preview looks to Katana, support for multiple colours in paint strokes, and the option to paint full-colour decals onto a surface.

A separate beta release, Mari 4.8, provides the same new features, but is built on Python 2.7.

A move to Python 3 as part of support for VFX Reference Platform CY2020
The biggest structural change in Mari 5.0 is its move from Python 2.7 to Python 3.7 as part of wider support for the VFX Reference Platform‘s CY2020 specification.

The change brings Mari back in line with other major DCC applications, most of which have already switched to version 3.x of the programming language, Python 2 having reached its end of life in 2020.

For studios that have not yet moved their pipelines to Python 3, Foundry has a separate build of the software, Mari 4.8, which provides the same new features as Mari 5.0, but which remains on Python 2.7.

New USD-based workflow for exporting preview looks to Katana
Of those new features, the headline change is initial support for USD-based workflows.

Although Foundry took over development of an open-source USD importer from Pixar last year, the new releases are the first to ship with a built version of the plugin.

With it, users can import assets in USD format into Mari, although currently only meshes: the importer doesn’t yet support the USD lighting or camera schemas.

Foundry has also introduced a new Mari shader type that approximates the look of UsdPreviewSurface, the standard preview material specified by the Universal Scene Description framework.

Artists can then export flattened representation of material looks using the USD Preview Surface Shader to other DCC applications with Hydra-based viewports, like Katana, its own lighting and look dev software.

The new features are described as the first phase of a more fully featured USD export workflow, intended to “reduce pipeline friction” between Mari and Katana.


Long-awaited updates to the brush system
The release also updates Mari’s brush engine, previously little altered since Mari 1.0.

New features include support for multiple colours for the ‘splats’ that make up brush strokes composited to the paint buffer, making it possible for colour to vary along a stroke.

Users can jitter the hue, saturation and value of the splat colours individually.

Other changes include the option to use a full colour image as a brush tip, instead of just using the image’s alpha channel to define the shape of the brush, making it possible to paint decal images onto an asset.

Users can also use any individual RGB colour channel or the Luminance channel to define the brush tip.


New gradient procedurals for use as masks
Mari 5.0 also introduces five new gradient procedurals, which generate colour gradients that can be used as masks for paint or material effects.

Gradients can be generated according to the distance or facing angle of a point on a model’s surface to a camera or another object, or based on the distance between two objects.


Apply filters non-destructively to Bake Points
Mari’s Bake Points, used to cache the output of sections of the node graph, get support for Filter Stacks.

The change makes it possible to apply filters like Gaussian Blur non-destructively, rather than having to convert the entire material graph to a Paint node and apply the filters there.

Users can toggle individual filters on or off from the Bake Point Node, helping to debug the results visually.

Workflow and performance improvements
Workflow improvements include a Nuke-style Snap to Grid system, making it possible to snap the positions of nodes in the graph automatically to a background grid, helping to keep complex graphs organised.

Performance improvements include “up to 50%” faster shader flattening when applying a Bake Point or Paint Node, and a more efficient mechanism for cleaning out old cache data to reduce project file sizes.

Pricing and availability
Mari 4.8 and Mari 5.0 are available for Windows 10 and CentOS/RHEL 6+ Linux. Foundry announced earlier this year that it is discontinuing Mac support in Mari.

Node-locked and floating perpetual licences cost $2,280. Rental starts at $65/month or $659/year.

Read an overview of the new features in Mari 5.0 on the product website

Read a full list of new features in Mari 5.0 the online release notes

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