CGTalk - Alpha channel depth

steverage

04-28-2003, 04:36 PM

I have a series of grids with a corn texture applied each having an alpha channel. However, when theyre rendered, the alphas go wrong - is there a setting where u have to tell XSi how 'deep' it looks through alpha channels?!

http://www.lumierestudios.co.uk/panda_site/files/Skytest_crop.1.jpg

Cheers

PS - nice one on the new tuts ed!!
EDIT - notice 2 tutorials I wrote have appeared in the new list too :D coooool cheers for the plug ;)

tachy0n

04-28-2003, 05:15 PM

Well you could try increasing the Maximum ray depth and refraction depths in the render settings (Under optimisation)

Also check out the sprite shader node, which is optimised for this kind of use, ie mapped billboards with transparency maps.

Atyss

04-29-2003, 12:35 AM

For such task, the sprite shader is really the way to go. Increasing the ray depth will only increase render times dramatically.

Cheers
Bernard

steverage

04-29-2003, 12:37 AM

Cheers for the replies guys...

I dont know anything about the sprite shader - anyone know any good tutorials for it?

marci2001

04-29-2003, 09:05 AM

1.connect your image node to the sprite node's matte subnode, input subnode and use_matte subnode
2.connect your sprite node the material nodes (for the photon subnode you can't use it)

enjoy or compose

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