Decal mapping woes

V-Ray V-Ray Common Render Theory
1

Trying to get a decal onto a plastic cup and i came accross this post http://www.chaosgroup.com/forums/vbulletin/showthread.php?t=32073&highlight=decal
can someone tell my why this has to have unwrap uvw to work? I have avoided UVW unwraps like the plague over the years and now theya re back to a hunt me.

I need to cylindrically wrap the logo (I am just using a dummy guinness logo in this case) onto the cup and i though I could just use a UVW MAP - If I do that however the logo is barely visibly when it is rendered. If I paste in the uvw unwrap modifier from the other post it comes in planar so I cant use that. Here is the scene, http://www.coastal-cottage.com/temp/cup1\_temp.zip

My model is the large cup and the small glass thingie beside it is from the link listed above.

any help would be much appreciated,

Tom

2

It says file not found…

Best regards,
Vlado

3

hey, trust me, i tried to stay away from unwrap for a while but its worth learning

4

oops
File is there now,
Thanks

5

it shouldn’t make any difference whether you unwrap it or not, if the logo is barely visible it’s more likely to be a shader problem rather than a mapping one.

but as long as unwrapping goes I can’t see why you would avoid it, really often it’s the fastest and more efficient way to paint maps (and sometimes the only one).

6

all sorted ;o)