The shader itself has a bunch of basic controls for placing your room interior: Premultiplication is happening in the shader, so if your input midground/curtains area is already premultiplied you will most likely get dark edges. The midground and curtains layer should be unpremultiplied.If your bounds are bigger or smaller than your output format it will mess up the alignment in the shader. Most renderers will take the bounds of the data window over the actual display window (this is also the case when converting to. If you are exporting your texture in an initial format that keeps bounding boxes (like OpenEXR), make sure that the bounding box matches your format exactly.This is mainly for performance reasons but is a requirement for RenderMan. For use with RenderMan and Arnold, make sure to convert your textures to mipmapped texture files using maketx (Arnold) or txmake (RenderMan).Make sure you only have an alpha in the midground and curtains area.Īll walls, the ceiling and the floor should have a black alpha.

When you create your own textures there are a couple of things to keep in mind: The textures can be created in your favorite 2D program, but if you have access to Nuke and you are familiar with it I also added an example Nuke script to the package for creating and laying out your own window boxes. With it you get a few convenience features so you won’t have to worry about making sure everything is placed in the correct spot. It’s solely texture based – it takes a single input texture which should be laid out in a specific way to make sure the different sections of the room are where they are supposed to be:Īpart from all the walls of the room you also have a midground layer (which could be furniture for example) and a curtains layer to give additional complexity and depth. It therefore safes you from modeling room interiors for mid-/background-buildings. It’s been a really exciting but also quite tough journey for a not very math-savy person like me to do this project but I have been able to mash something together that works! This shader is useful for giving the illusion of room interiors on just a single plane.

too much time :) ) to do this sort of shader myself in OSL!

Since then this has always stuck in my mind and I saw it being used in some studios I worked at whenever there was a big city to be rendered. I remember one of our teachers in university telling us about how they rendered all the interiors of the buildings in Spiderman with just a simple plane with a shader attached to it that simulates the room interior with proper parallax. The latest addition on my journey to OSL is a WindowBox (sometimes also called Interior Mapping or Parallax Mapping) shader.

Blender vray github