Monday, 25 May 2009

Rendering Process

Sam And I have recently started rendering out the shots and this is the process we have started using to bring them together ready to composite. Rendering requires several passes in order to get a better look to each shot. Within Maya we set up different render layers which will all commence when we hit 'batch render'. This is what the layers look like in Maya.

Basically to create render layers we select the objects we need in that layer and then add them to the necessary layer. Below is what an RGB layer for the train looks like in the viewport.

The RGB pass provides the colour for the particular layer and this takes into account the lighting which must be added to the layer also. We then run an occlusion pass which simulates the way light would hit objects. For example it will add darkness to small crevices or areas where light would not emit or reflect so much. Again below is how this pass appears in the viewpoint, basically a black shape.

Once we run the render pass we then get the following kind of result outputted as a TIFF. This is the basic RGB.

And this is the Occlusion pass for the same object.

Obviously when rendering we render out sequences of TIFF's. The process of compositing then combines both the RGB and Occlusion layers along with the backgrounds which are done on separate passes along with things like Dynamics and Shadows. These are often done separate either to have more control or to try and reduce render times.

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