LDraw.org Discussion Forums

Full Version: Transparent stickers
You're currently viewing a stripped down version of our content. View the full version with proper formatting.
Pages: 1 2 3 4
It has lately become more common with stickers printed on transparent plastic, to be placed on opaque bricks.
Is it correct, and even necessary, to always add a BFC NOCLIP in a transparent sticker, or is it incorrect to have a NOCLIP in a transparent sticker intended for a opaque brick?

We have a recent set of stickers containing a NOCLIP on the PartTracker and I don't know how to review them.
(2017-06-21, 21:38)Magnus Forsberg Wrote: [ -> ]It has lately become more common with stickers printed on transparent plastic, to be placed on opaque bricks.
Is it correct, and even necessary, to always add a BFC NOCLIP in a transparent sticker, or is it incorrect to have a NOCLIP in a transparent sticker intended for a opaque brick?

We have a recent set of stickers containing a NOCLIP on the PartTracker and I don't know how to review them.

I was actually wondering about transparant stickers too. Exactly those stickers you mentioned as an example. Maybe a bit off-topic, but are they already transparant? I thought they weren't, but when I wanted to make the sticker transparant, I actually did not quite know how to. In the end, I just made them the color I was applying them on (in my case LBG).

Or maybe skip and remove the transparant piece of the sticker altogether and just keep the actual printed part of the sticker. For LDraw there isn't a whole lot of uses for the extra bit of transparent stickersheet right?

Btw, if you are reviewing those stickers; a, b, h and i need to be white inside the ovals instead of that lightgray; that looks much more like the real sticker. And a is missing a triangle it seems  Wink
(2017-06-22, 6:21)Merlijn Wissink Wrote: [ -> ]
(2017-06-21, 21:38)Magnus Forsberg Wrote: [ -> ]It has lately become more common with stickers printed on transparent plastic, to be placed on opaque bricks.
Is it correct, and even necessary, to always add a BFC NOCLIP in a transparent sticker, or is it incorrect to have a NOCLIP in a transparent sticker intended for a opaque brick?

We have a recent set of stickers containing a NOCLIP on the PartTracker and I don't know how to review them.

I was actually wondering about transparant stickers too. Exactly those stickers you mentioned as an example. Maybe a bit off-topic, but are they already transparant? I thought they weren't, but when I wanted to make the sticker transparant, I actually did not quite know how to. In the end, I just made them the color I was applying them on (in my case LBG).

Or maybe skip and remove the transparant piece of the sticker altogether and just keep the actual printed part of the sticker. For LDraw there isn't a whole lot of uses for the extra bit of transparent stickersheet right?

Btw, if you are reviewing those stickers; a, b, h and i need to be white inside the ovals instead of that lightgray; that looks much more like the real sticker. And a is missing a triangle it seems  Wink

Correct on the mentioned issues with a,b,h,i, will have a look at that. About transparency, most of the stickers are transparent with the set I have, but maybe there are different versions?
When rendering the parts I usually replace the transparent color with the actual color of the part on which the sticker is applied to.
(2017-06-21, 21:38)Magnus Forsberg Wrote: [ -> ]It has lately become more common with stickers printed on transparent plastic, to be placed on opaque bricks.
Is it correct, and even necessary, to always add a BFC NOCLIP in a transparent sticker, or is it incorrect to have a NOCLIP in a transparent sticker intended for a opaque brick?

We have a recent set of stickers containing a NOCLIP on the PartTracker and I don't know how to review them.
I wouldn't use noclip if these stickers are to be applied on opaque bricks.
(2017-06-22, 6:30)Evert-Jan Boer Wrote: [ -> ][...]
About transparency, most of the stickers are transparent with the set I have, but maybe there are different versions?
[...]

I didn't mean the real stickers, I meant the LDraw versions. I though they weren't transparant, but Magnus' wording made me doubt that and I thought I maybe just used them wrong.
If I read the Sticker spec right the uncoloured transparent top surface on a sticker should use code 16. Not code 47, Trans_Clear.

And a "transparent" sticker intended to be placed on a opaque brick doesn't need to have a BFC NOCLIP.
But, is it incorrect to have a BFC NOCLIP in a sticker not intended for a transparent brick? Should I Hold-vote it?
(2017-06-22, 7:33)Philippe Hurbain Wrote: [ -> ]
(2017-06-21, 21:38)Magnus Forsberg Wrote: [ -> ]It has lately become more common with stickers printed on transparent plastic, to be placed on opaque bricks.
Is it correct, and even necessary, to always add a BFC NOCLIP in a transparent sticker, or is it incorrect to have a NOCLIP in a transparent sticker intended for a opaque brick?

We have a recent set of stickers containing a NOCLIP on the PartTracker and I don't know how to review them.
I wouldn't use noclip if these stickers are to be applied on opaque bricks.

I think there are two ways to think about this. The first way is to make it look like the real thing. To do that, peel the sticker off the sheet and look at the back. Whatever you see there (Pure white over the printed section? The printed pattern in mirror image? Something else?) is what the part should model to match reality. If it's the printed pattern in mirror image, then noclip for the pattern geometry is the way to achieve this. If it's pure white over the printed section, then backwards-facing BFC'd white geometry would be how to achieve this (with frontwards-facing BFC'd pattern geometry). If it's something else, then that would have to be thought about too.

The other way to look at things is to consider how the sticker is going to be used. If you assume the sticker will always be applied to opaque bricks, then frontwards-facing BFC'd pattern geometry is fine, because the user will never see the back of the sticker. The problem here, is, with stickers being present in LDraw, is it right have them only look right if they're applied to opaque bricks? Are the stickers then only considered valid if used in the same way they are used in the official model?
The transparent sticker thing has bothered me for a while :-)

Setting the colour of the part to be the colour of the brick it's being applied to only works so long as you're applying the sticker to a single part (or group of parts of the same colour).  It doesn't work so well if the sticker goes across multiple parts of different colours.

Using colour 47 doesn't really work, as it's semi-opaque and produces this result:

[Image: Untitled1.png]

I was playing around last night, and tried creating a new colour definition:

   
Code:
0 !COLOUR Trans_Sticker                                        CODE  510  VALUE #ffffff  EDGE #82566E  ALPHA 16

I then set my transparent sticker parts to this, and the model renders quite nicely:

[Image: Untitled2.png]

It's still obviously a transparent sticker and it bears some resemblance to the real-life model in that you can see the edges, but the transparency isn't so in-your-face as with colour 47 :-)

What do people think?  Useful?  Could it be added to LDConfig.ldr?
Interesting idea... "official" way to do trans stickers is to use color of the underlying brick, but indeed it doesn't work well for STAMP.
(2019-08-04, 12:02)Philippe Hurbain Wrote: [ -> ]Interesting idea... "official" way to do trans stickers is to use color of the underlying brick, but indeed it doesn't work well for STAMP.

I've always wondered about the use of colour 16 in stickers - unlike bricks, there's no such thing as a "sticker that comes in multiple colours", so I'd have thought we would want to model the sticker exactly as-is - with either colour 15 for white stickers or something like my proposed colour above for transparent ones (and other colours if/as required, of course).
Pages: 1 2 3 4