Forum: Carrara

Subject: Alpha mask or transperancy blend?

Mun opened this issue on Nov 30, 2004 · 20 posts

Mun posted Tue, 30 November 2004 at 1:29 AM

Attached Link: http://philipfong.tripod.com/id10.html

Can anyone tell me if there is a solution to alpha masking or transperancy mapped to cut away portion of a model? The edges appear to have a glow arround the croped section, I have tried both transperancy, oppacity, glow but nothing works. how do you do this kind of masking anyway? Thanks. Philip

TOXE posted Tue, 30 November 2004 at 2:16 AM

Hi Philip, on what version of carrara you working? In carrara4 the alpha channel work fine... But if i remeber well, in carrara 3 you can use multi channel mixer with single shader in the transparency channel, sorry i have uninstalled C3! -TOXE

TOXE posted Tue, 30 November 2004 at 2:25 AM

Ok, now i remember, this is an example without alpha channel... HTH -TOXE

TOXE posted Tue, 30 November 2004 at 2:51 AM

...or you can cut your models with Anything Grooves without alpha mask. -TOXE

falconperigot posted Tue, 30 November 2004 at 3:06 AM

That is so sad! :-(

TOXE posted Tue, 30 November 2004 at 3:23 AM

Sad? And this?

rendererer posted Tue, 30 November 2004 at 5:17 AM

This would be a fun contest - who can slice up this guy in the meanest and funniest way. :-D

Mun posted Tue, 30 November 2004 at 5:28 AM

Attached Link: http://www.3dcommune.com/3d/galview.mv?Carrara_RDS+amZbNFtFw+1101805336+&v_index=5&nd=1101820314

Yeaks! wrong link above, sorry here it is at 3d commune. I forgot that you can post image here. Thanks for the examples, I am still using C3 and the result is not like that, it seems like the croped area is not complete leaving glow edges. I'll try to convert the mask to greyscale.

falconperigot posted Tue, 30 November 2004 at 10:15 AM

Well, I reckon TOXE would win any MEANESS contest hands down (or is that hands up?). I just WEPT when I saw the holes in that poor guy. I shall join SCULPT immediately (that's the society to Stop Cruelty and Unpleasantness to Little Polygon Thingies) ;-)

TOXE posted Tue, 30 November 2004 at 11:18 AM

Sssssh, no, no an association called SCULPT doesn't exist. Maybe area 51, but not SCULPT. Shhhhhh. -TOXE

Pete_Exxtreme posted Tue, 30 November 2004 at 1:20 PM

LOL !!!!!! Excellent !

falconperigot posted Tue, 30 November 2004 at 1:48 PM

Hmm, well, I don't know about that....

Mun posted Tue, 30 November 2004 at 8:35 PM

a test on a simple sphere, I want the trasperancy to fade off but what I get is a harsh polygon and should not appear to look additive(lighter). Maybe I am looking for the disappear button.

falconperigot posted Wed, 01 December 2004 at 2:42 AM

Attached Link: Transparency shader tree

Mun, check out the method in this thread. If you still can't get it to work post a screen shot of your shader tree. It is perfectly possible to do what you want.

Mun posted Wed, 01 December 2004 at 7:32 AM

Hah! I got it! Its the blender, why an extra image map to do that, I was planing to use this technique on my new models but seems won't that increase file size or render time?

falconperigot posted Wed, 01 December 2004 at 12:48 PM

You can do it with one map, in the blender, with values of 0 & 100 in the transparency channels of the two sources. The number of maps you have will only increase file size if you save them internally. And it's using transparency which will increase the render time; using texture maps - as opposed to procedural shaders - will reduce render time.

Mun posted Thu, 02 December 2004 at 12:12 AM

Here is the test, I am using a few 3d applications and want to find the best possible solution to create obj models. Thanks, and fun chating with images too!

falconperigot posted Thu, 02 December 2004 at 1:23 AM

Looks good!

TOXE posted Thu, 02 December 2004 at 1:54 AM

I agree, really nice! You have modeled it with carrara?

Mun posted Thu, 02 December 2004 at 5:50 AM

It was from Hash and intended for OBJ export, it was edited in C3 to increase geometrical detail, C3 is able to edit while preserving the UV mesh. Apart from that I also do vector style and other renderings for models from Zbrush. Thanks for the help guys.