alpha channels

Introduction to Maya - Rendering in Arnold

This course will look at the fundamentals of rendering in Arnold. We'll go through the different light types available, cameras, shaders, Arnold's render settings and finally how to split an image into render passes (AOV's), before we then reassemble it i

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# 1 14-01-2006 , 04:19 PM

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Location: London

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hey
i am wanting to do some compositing. i hade my model and used backgroud shader ect. rendered it and the alpha channel is there so there is the model and its shaddow. i have saved it as a targa and boght it into photoshop. BUT under channels it does not have an alpha channel it have RGB, Blue,Red,Green so i am stuck
ne ideas y there is no alpha cos i know it hould be there as i am following the digital tutors free composite tut.

thanks in advanced

Now at SMU doing BSc 3D Computer Animation so its hard to get on here
My wire render tut https://forum.simplymaya.com/showthre...threadid=20973

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# 2 15-01-2006 , 02:04 PM

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Did you have the alpha channel check box ticked in your render globals?

Try rendering as a tif just to see if it works

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# 3 15-01-2006 , 02:39 PM

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i have rendered a tiff and that had an alpha channel wen i opened it in photoshop
i will check my render global settings though

edit user added image

add on)
i tried again n fount that wen i save as targa it only saves the model and its shaddow and no black background so at least now i can composite it
i tried tiff it had an aplha channel but wen i used it it did not take its colour just black and white.

also does ne one know how to lighten the colour of the shaddow without effecting the actual colour of the model

many thanks

Now at SMU doing BSc 3D Computer Animation so its hard to get on here
My wire render tut https://forum.simplymaya.com/showthre...threadid=20973

Last edited by pbman; 15-01-2006 at 08:03 PM.

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# 4 16-01-2006 , 11:02 AM

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do you mean the shadow in your render?

If so you can render it as sepperate layers and composite it in photoshop, adjusting the opacity/colours/ contrast etc of the shadows

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# 5 16-01-2006 , 04:08 PM

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yes i do mean the shaddow in the render bith on the model and on the floor(use background shader) can u plz explain how to go about rendering it in seperate layers

Now at SMU doing BSc 3D Computer Animation so its hard to get on here
My wire render tut https://forum.simplymaya.com/showthre...threadid=20973

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