Wednesday, 16 February 2011

Introduction to Lighting


In this scene various lighting techniques have been incorporated such as spot lights and a free direct light. This creates an interesting effect. Even though there aren't any shadows in the scene, it has still rendered well.

The torus has had a material map added to create a chrome effect. This was accomplished by selecting 'raytrace' in the menu for reflection, and the material was added to the shape. Whereas, the teapot has had a glass effect added for when it is rendered. This was achieved by choosing 'raytrace' in the refraction option in the material editor. These are both very effective tools that can be incorporated into the trailer.

The more lights, shadows and materials that are added to the shapes add significantly to the render time. This is because each individual pixel in the scene needs to absorb light and take the colour of surrounding objects into the colour of that object itself. So in a small scene there could be thousands of pixels all trying to encapsulate their own colour as well as their numbers, which as a consequence takes a long time to render. This will need to be taken into consideration when making the trailer.

Whilst the scene is being created resolution levels can be lowered to make the rendering much quicker, so that the basic concept can be established and once complete ready for the final render the levels can be restored to their higher states. It is very important to remember that the gamma levels on each workstation that is used in this production is set to 2.2, as this will also affect the final render if it is set lower or higher. This can be altered using the menus provided by 3ds Max.

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