topic Re: Tips Alpha Channel & Texture Correction in LW in Visualization

Tips Alpha Channel & Texture Correction in LW

Anonymous — Thu, 11 May 2023 10:27:09 GMT

My hope it can useful for all
Apology, if related this topic already posted before

3D Window Preview :

Render with Lightwork :

Tips in Photoshop & Lightwork Rendering:

If those related links get broken, just download content at the next post .

Re: Tips Alpha Channel & Texture Correction in LW

Link — Mon, 02 Apr 2007 23:57:39 GMT

That's a pretty decent tip!

Not sure why you were banned for it. Hopefully it was a mistake that will be reversed.

Cheers,
Link.

Re: Tips Alpha Channel & Texture Correction in LW

Anonymous — Tue, 03 Apr 2007 06:27:55 GMT

Thank You Link,

I believe this mistake (Banned account) already corrected.

have a good day!

Re: Tips Alpha Channel & Texture Correction in LW

Dwight — Tue, 03 Apr 2007 07:20:00 GMT

Easy to fix when you know the right people.

Tips Alpha Channel & Texture Correction in LW

Anonymous — Tue, 03 Apr 2007 14:55:50 GMT

Due Uploaded server often unable to present this threat,
I decided to re-post this topic.

Preview how it's used:

Tips Alpha Channel & Texture Correction in LW

Anonymous — Tue, 03 Apr 2007 15:00:22 GMT

Due Uploaded server often unable to present this threat,
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Photoshop Section tips: Creating Alpha Channel (Part 1)

Tips Alpha Channel & Texture Correction in LW

Anonymous — Tue, 03 Apr 2007 15:06:09 GMT

Due Uploaded server often unable to present this threat,
I decided to re-post this topic.

Tips Texture Correction in Lightwork Rendering: (St. Layout Is the Answer) AC9 User
Users of Archicad 10 should note that when "Matching Internal Engine," to transfer texture map information from the Internal Engine to the LightWorks Engine, that the transfer bug inverting the texture map in Archicad 9 has been fixed.(Dwight Atkinson)

Re: Tips Alpha Channel & Texture Correction in LW

Dwight — Tue, 03 Apr 2007 16:10:08 GMT

Please let me add one modification to this list of instructions:

Users of Archicad 10 should note that when "Matching Internal Engine," to transfer texture map information from the Internal Engine to the LightWorks Engine, that the transfer bug inverting the texture map in Archicad 9 has been fixed.

The ST layout instructions will now result in an inverted image.

Re: Tips Alpha Channel & Texture Correction in LW

Anonymous — Tue, 03 Apr 2007 16:54:14 GMT

Thank you for your Information Dwight!
I didn't realize that was a bug! (till u explained it)
yes, I'm using AC9 to work with it!

Dwight, Final released of AC9 still appear this bug?

Cheers!

Re: Tips Alpha Channel & Texture Correction in LW

Dwight — Tue, 03 Apr 2007 16:57:20 GMT

you would need to answer that for yourself.
I am always so far ahead of the curve......

Re: Tips Alpha Channel & Texture Correction in LW

Karl Ottenstein — Tue, 03 Apr 2007 17:52:59 GMT

And, as Luzan mentioned the use of the alpha-masked images in Artlantis... one should mention that they are immediately usable in Piranesi as well, but even more simply as Piranesi doesn't need any geometry, it will just inert the masked image to scale, with shadow casting, in a scene. 😉

Karl

Re: Tips Alpha Channel & Texture Correction in LW

Chazz — Tue, 24 Mar 2009 17:27:57 GMT

This is a fantastic summary Luzan, thanks for posting it and doing so in th face of the impossible language of english. Thanks also to all the other contributors.

My question is if this could be done using the Picture Object in the library and instead of making a material, you just point the Picture to the Tiff file directly. Would this still work? It seems like it would be easier but I'm probably forgetting half a dozen steps. Anyone?

Re: Tips Alpha Channel & Texture Correction in LW

Dwight — Tue, 24 Mar 2009 18:19:23 GMT

Using Picture 12 and a masked image is simple:

Start with a PNG file. PNG is a relatively new format that supports transparency.

When you turn off the frame in the Picture 12 and call an image made in Photoshop with a transparent background, you'll get a masked shape.....

of course, that image must be in the library database so if you lalalala have a new image, you must load it or Archicad can't see it lalalala....

Re: Tips Alpha Channel & Texture Correction in LW

Chazz — Tue, 24 Mar 2009 18:46:30 GMT

Thanks as always Dwight. Your info is excruciatingly l timely, I was just working on it. And it is so nice when one actually does know the lalalala parts.

And the shadow-casting part works too? That seems to me like a minor miracle to me. I'll do a test here in a bit.

Re: Tips Alpha Channel & Texture Correction in LW

Chazz — Tue, 24 Mar 2009 20:07:47 GMT

Can't get the transparency to work with PNG but it works great with TIFF. On the downside, I can't get the shadow casting to work with TIFF or PNG.

Re: Tips Alpha Channel & Texture Correction in LW

Dwight — Tue, 24 Mar 2009 20:39:44 GMT

I guess you need PING, BLINGG or DING formats for that.

Back to the floating icon on the material, then. Not so bad, eh?

Re: Tips Alpha Channel & Texture Correction in LW

Chazz — Tue, 24 Mar 2009 20:45:51 GMT

It gets curiouser and curiouser.....

OK, when I export to Atlantis 2.0, the transparency does NOT come through (on TIFF or PNG) but the shadow casting IS present in both file types (for the rectangular shape, not the cutout shape). If anyone anyone had any thoughts about what I'm doing wrong, I'm all ears.

Re: Tips Alpha Channel & Texture Correction in LW

Dwight — Tue, 24 Mar 2009 20:47:15 GMT

Just tell artlantis to use the alpha channel, or another background color...

Re: Tips Alpha Channel & Texture Correction in LW

Chazz — Tue, 24 Mar 2009 21:10:13 GMT

Dwight wrote:
Just tell artlantis to use the alpha channel, or another background color...

Pretty sure I've tried every permutation and combination in Artlantis. No love. I can get the alpha material to look like translucent smoked glass but nothing totally clear & transparent. This may be something I should take up in the Artlantis forums......

Re: Tips Alpha Channel & Texture Correction in LW

Thomas Holm — Tue, 24 Mar 2009 21:24:04 GMT

You may test to place the image itself in Artlantis, as texture on an empty object with invisible material, instead of exporting the Archicad object with attached image.