This sets up the node where we will be connecting all the layers. A patina, a diffuse layer that's a bit crusty and blue-green in colorĬreate a PxrLayerMixerand connect its out port to the inputMaterial port of the PxrLayerSurface.Two basic layers of materials are needed: Another method for creating a patina is to use vinegar and salt to create a crust on the metal, which is the look we'll experiment with here. ![]() For example, heating a metal to produce different colors could be replicated using the iridescence attributes in PxrLayerSurface. Depending on the look you are aiming for the layout of the materials will vary. In researching the creation of a patina on copper or other metal you will find it is a multi-stage project which can involve a variety of methods. Layer-specific attributes such as color and texture come from upstream materlal(s) connected into the inputMaterial attribute.įrom here planning is very important to avoid duplicating work and making your material network as simple and useful as possible. PxrLayerSurface contains only global attributes which would apply to all layers. The reason for this is that PxrLayerSurface is designed as the Bxdf on top of which layers of patterns are combined. This is the framework that will inform RenderMan which materials will be rendered for the assigned object (new nodes are colored with red):Īt this point you could render with our new shading network but there's not much you can do with this material on its own this node has a limited set of attributes. The scene is renderable at this point, however we have no materials assigned to the statue so it will render with RenderMan's default Bxdf shader: PxrDiffuse.Ĭreate a shading network and assign a PxrLayerSurface Bxdf to your object. Load the layeredMaterial_prep.katana tutorial scene which contains the framework for loading the statue geometry, a ground plane and spot lights. At the bottom of this tutorial you can find a Katana scene to download with the parts necessary to reproduce this image. This means effects like car paint, labels on bottles, dirt or mud, can all be layered efficiently for rendering.īelow you can find a step by step example of creating a patina on a bronze statue. ![]() RenderMan allows for creating complex looks through layering materials.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |