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Lighting La Salle Chapter 5: TV-Lit

By Luciano Iurino
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Date Added: 7th June 2012
Software used:
Maya, mental ray

Do another test render. Now there's much more light (don't worry if it looks over-exposed, we'll take care of it later) and there are some photons visible in the scene (Fig.07).

1483_tid_Fig07.jpg
Fig. 07


Go back to the Indirect Illumination settings and enable Final Gathering. Set its Accuracy to 100, Point Density to 2 and Point Interpolation to 100 (Fig.08).

1483_tid_Fig08.jpg
Fig. 08


Render the scene again. Now it's much better, but the picture is still too over-exposed. We need the "mia_exposure_photographic" node to fine-tune the exposure and overall look of the image (Fig.09).

1483_tid_Fig09.jpg
Fig. 09

Open the Quality tab in the Render Settings and make sure that the Gamma value is set to 0.454 (Fig.10).

1483_tid_Fig10.jpg
Fig. 10

Open Hypershade and drag the Camera you're using into the graph. Drag a new "mia_exposure_photographic" node into the graph and connect it to the camera node (Fig.11).

1483_tid_Fig11.jpg
Fig. 11


If you render the scene now, the picture will be all black; we need to set the exposure parameters. These are the parameters used in the scene:

- Cm 2 Factor: 2000
- ISO: 100
- Shutter: 100
- F Number: 8
- Vignetting: 11
- Burn Highlights: 0
- Crush Blacks: 1
- Saturation: 1.2
- Gamma: 1

In Fig.12 you can see a quick test render using the previous settings.

1483_tid_Fig12.jpg
Fig. 12




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Readers Comments (Newest on Top)
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(ID: 123631, pid: 0) Eyeworks on Fri, 08 June 2012 4:07pm
Thank you for the tutorial. It's nice to see the process behind realistic 3d images. However I would like to comment on something. Although I'm a Max user and work with Mental Ray there I believe the room in the final image of the tutorial has too much bright light in it. I think a room of such size would be darker with only the tv on. The center of the image seems lit by a photographic camera's flash and in general it's kind of white rather than having the bluish tones appearing on the tv. Thanks again for sharing your thoughts and process. The room is beautiful nevertheless.
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