# Marso Measure Processing Options ### Capture Methods **Multi-Viewpoint** = Freehand, Turntable, Lightstage, Robot Controlled. ### Generation **Gen 1.0** = Works well for most scans, does require a high coverage count and well aligned camera poses. **Gen 2.0** = Improves results for freehand scans that have low image overlap, increased material clarity. Only available for the Narrow Material Gamut. **Gen 1.1** = Gen 1.1 brings meaningful improvements to material accuracy across the board. The model now more reliably distinguishes between metallic and non-metallic surfaces, produces more consistent roughness values, and outputs stronger normal maps. Colour reproduction has also been improved. ### Material Gamut **Wide** = A wider gamut of materials, including reflective and colour metals. Good quality but less accurate then the narrow material gamut. **Narrow** = Fine-Tuned on a narrow gamut of materials, not including metals. Great for leathers, woods and plastics e.g Shoes & Furniture. **Combined** = Combined gamut of materials, including metals. Good ability to distinguish between metals and non-metals. Our most accurate model. ## Understanding Materials Gamuts ### What is PBR? PBR-material-properties can describe a wide range of physical materials, ranging from the simple leathers, woods, and all the way through to complex physical materials such as metal chromes, copper, and shiny coloured nylons. ### Two Principal Shaders PBR generally describes two main workflows: a Specular-Workflow or a Metallic-Workflow. They both aim to do roughly the same thing, but are built for slightly different use cases. The **Specular Workflow** can describe far more materials at the cost of having to store more data, and being slightly less intuitive for artists. It has a coloured specular texture, which is able to describe both matte objects, glossy surfaces, and transition all the way up to metal objects within a 0-1 range. The **Metallic Workflow** is a simplification of the specular-workflow, aimed at being more data efficient and artist-friendly. The metallic-workflow, uses a greyscale texture map which is often binary, to describe if the surface is a metal or a non metal. In contrast to the specular workflow which uses a coloured texture map to describe the full scope of both metal and non-metals, with a transition occurring somewhere along this range. For this reason, a specular-workflow covers more of the potential material property space than the metallic-workflow, whilst being able to be converted into mapped into a metal shader. {% hint style="success" %} Marso Measure, by default, authors material textures into both workflows simultaneously making it easy to plug into a variety of different 3D applications. {% endhint %} ### How Marso Measure handles complex and easy material types Marso Measure has been designed to capture as many material types (real world) as possible, and M-XR’s researchers are continuing to push the bounds of what Marso Measure can acquire! Think of all these possible materials as a spectrum of space, similar to a colour space, and M-XR’s ambitions with Marso Measure is to capture as wide of a gamut of this space as possible.

\ Marso Measure is capable of capturing quite a wide-gamut of this material space, to offer more photorealistic objects with unique properties. However, this makes the challenge of identifying materials much harder. This can sometimes lead to subtle inconsistencies in some of the material properties, notably roughness. {% hint style="warning" %} To mitigate this, and give our users more control, Marso Measure offers the option to select between two different material Gamuts : Wide and Narrow, depending on your scan and use case. {% endhint %}

### Narrow vs Wide Gamuts Whichever gamut you select, you can still use these in a metallic or specular workflow. {% tabs %} {% tab title="Narrow Gamut" %} Capable of measuring all the materials very confidently within a slightly narrower gamut of this potential material space such as leathers, plastics, fabrics, woods, ceramics. What it cannot do is capture material outside of this range as they start to become metals. {% endtab %} {% tab title="Wide Gamut" %} This is capable of capturing much further into this potential material space, which includes all of the narrow-gamut materials in addition to: silver metals, coppers, pearls and many more. {% endtab %} {% tab title="Combined Gamut" %} Combined gamut of materials, including metals. Good ability to distinguish between metals and non-metals. Our most accurate model. {% endtab %} {% endtabs %} ### Tips & Tricks for suggested workflows If you are unsure which Gamut to use, then it is best to just use both. Exporting for both wide and narrow doesn’t create a huge overhead for Marso, maybe an extra \_\_ minutes or \_\_% of additional processing time. Often, when predicting on a Wide Gamut, our users will find that swapping the roughness and normals for the ones from the narrow gamut gives the best results.