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View Full Version : Need Help to Light A Jet


junlai
10-10-2007, 01:34 AM
hi, im working on the maya 2008 and mental trying to light a scene where jet take off. Been working on the mental ray for couple days and having a problems. The idea is try to achieve a realistic Fighter Jet. Any Clue of where i should go toward to?

Here are some test render i got so far......
http://a.parsons.edu/%7Ejclai/blogimage/test.jpghttp://a.parsons.edu/%7Ejclai/blogimage/test_2.jpghttp://a.parsons.edu/%7Ejclai/blogimage/test_3.jpg

mister3d
10-10-2007, 03:47 AM
There shall be no big difficulties in lighting an outdoor jet: you have 2 light sources(as in real life) - sun and sky, and the key-to-fill ratio should be 2:1 or less(2:0,5, 2:0,2 etc) depending on the weather and mood you are trying to create(the more difference in key-to-fill ratio, the more contrasty and serious lighting will be), but keep these proportions as a minimum(2:1) not to wash out the picture. Now the position of light sources is good imo, you could set the sun a bit higher to drop it onto the second half of the jet, where now is only a shadow. So now you made the form of the jet well visible and read. You can increase the sun intensity if you want. I searched on the net(I don't know what the model is of the jet) and found some references http://images.google.com.ua/imgres?imgurl=http://home.quicknet.nl/qn/prive/lm.broers/picswar1/fa18c_1.jpg&imgrefurl=http://home.quicknet.nl/qn/prive/lm.broers/picswar.htm&h=768&w=1024&sz=175&hl=uk&start=1&tbnid=4oKcYrBjJUHowM:&tbnh=113&tbnw=150&prev=/images%3Fq%3DF/A%2B18C%2BHornet%26gbv%3D2%26svnum%3D10%26hl%3Duk%26sa%3DG

http://home.quicknet.nl/qn/prive/lm.broers/picswar1/fa18c_1.jpg

Look around them and you will see that your specular highlight on the glass of the cabin is too big and too much anisotropy, and the shader of the metal body lacks of specular highlights.
I would say that after this the key to make it good is to texture it very thoroughly: look how dirty the jet is on the second link, there are lots of imperfections. The size of highlights is constantly changing, so you could apply the texture to reflection channel to make it uneven. So minimum I would make color texture more dirty as on this reference(or another), then bump and reflection texture.

junlai
10-10-2007, 07:07 PM
im working with F22 type of Fighter Jet. Yea i definitely think i will start rework on the texture of the model. Right now its only a shader with a camo pattern. Thank you for the feedback, im definitely going to start to try to reset the scene and use the ratio.

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