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Visual Method and product visualization are going hand in hand.
Product Visualization is the act of using renderings, images, and artwork to visually communicate the products to customers. Through this method, customers can see a picture or rendering of the product while they are completing their orders online or through a product catalogue.
Someone can say that product visualization and Archviz are very similar industries. In most of the cases both using the same software's and similar workflow.
In Archviz depends from the project we build the 3d space that sometimes can be exterior , interior or a combination of both and after we are moving to the post production stage. In Product Visualization, we are working with the exact same workflow with the only difference that we add one more stage, the Colour Correction of the product.
This Wiki has as a purpose to check step by step the Workflow of creating all the masks for the products that we are going to need later in the CC stage .
Currently we have available 3 tools to produce this masks.
V-ray Multimatte elements that are created from the Material ID that we can manipulate from the material editor during the creation of the shaders or the Object ID (G-Buffer ID)
V-ray Cryptomatte.
Create custom masks with the Render Mask plugin.
We are strongly recommend to use the first 2 methods , Multimatte elements and Vray Cryptomatte, just because we can have ready all the masks together with our beauty pass, as separate render elements, without need to rerender any additional mask with the render mask plugin.
Render Mask plugin is a very useful script , but compare with the other 2 methods is time consuming, and time is money :))))
In this wiki we will check the first two methods.
V-ray Multimatte elements
The Multimatte Render Element creates Red, Green and Blue selection masks based on an object ID (G-Buffer ID) or Material ID. With this method its possible to create only this 3 colours .
The benefit of using Multimatte elements is that a single R, G, or B channel can be used directly as a matte, eliminating the step of selecting the colour in the compositing software. This ease of use makes Multimatte a popular choice for compositors.
To setup correctly the multimatte elements is a simple process .
Every new material by default has 0 Material ID .
If you hold click the material id channel will bring up a window and from there you can setup the correct material ID for each shader separately.
From this window we can setup 15 material ID's . If we need more material ID's then we just need to activate the effect ID from the options of the v-ray shader and continue adding more material ID's
Last step is to do the correct setup in the render elements tab that is located in the V-ray settings window. This is a well known process across all the artists in VM but is recommended to visit the official page of Chaos group for more informations.
https://docs.chaosgroup.com/display/VMAX/MultiMatteElement
Moving to practise , one big issue that many artists are dealing with is that we create sets and we are using assets and materials from previous projects to create a new set .
In many cases this assets and materials have already material ID's and this is causing many times overlapped matte colours because 2 or more different materials of different 3D objects have the same material ID.
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