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The resolution of the baked 2D images is determined by the standard Format description. For example:
Format 256 256 1
As an example, we’ll bake 2D textures of global illumination in a Cornell box with two spheres. The box consists of five squares, each with a separate texture. One of the two spheres is purely specular so we do not bake on that. Figure 2(left) shows the baked images for the five faces of the box and for the diffuse sphere.
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After baking is done, the next step is to run ‘txmake’ on each image to create a MIP-mapped cache-friendly texture in .tex format. These textures can then be read during rendering using e.g. OSL’s texture() function. Figure 2(right) shows the Cornell box and diffuse sphere shaded using the precomputed illumination textures (while the reflection in the specular sphere is rendered with ray tracing).