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Subject: need a procedural


ViperKilzz ( ) posted Sun, 23 August 2009 at 11:16 AM · edited Sat, 28 December 2024 at 11:43 AM

Content Advisory! This message contains nudity

file_437769.jpg

Greetings,

I need a procedural in the shape of a cross. I do not know how to make one. I need to put in over a light. I've enclosed an example. Can anyone help?

Thank you in Advance,
Viperkilzz

R I P MJ. He's must have needed an Angel escort in Farrah

Please spay and neuter your pets. Strongly consider shelter adoption before spending $500 to $1000. If you MUST part with that kind of money for a pet, go to your local shelter, donate the money to them and pickup a highly adoptable pet. The shelters could sure use the donation.


markschum ( ) posted Sun, 23 August 2009 at 11:29 AM

why a procedural ?  you could simply paint a transparency map on a prop square to use as a filter.


ViperKilzz ( ) posted Sun, 23 August 2009 at 11:46 AM

Marks, Thank u for answering, but i don't know how to "paint a transparency map" on a prop square.

R I P MJ. He's must have needed an Angel escort in Farrah

Please spay and neuter your pets. Strongly consider shelter adoption before spending $500 to $1000. If you MUST part with that kind of money for a pet, go to your local shelter, donate the money to them and pickup a highly adoptable pet. The shelters could sure use the donation.


IsaoShi ( ) posted Sun, 23 August 2009 at 11:47 AM · edited Sun, 23 August 2009 at 11:58 AM

file_437775.jpg

Here's one with sharp edges, pure black/white, I just threw together.

There's probably a more elegant way, but I didn't think about elegant, just quick! 

If you want blurry edges it'll take me a bit longer.

I'll post the material file in a minute.

"If I were a shadow, I know I wouldn't like to be half of what I should be."
Mr Otsuka, the old black tomcat in Kafka on the Shore (Haruki Murakami)


IsaoShi ( ) posted Sun, 23 August 2009 at 11:57 AM · edited Sun, 23 August 2009 at 11:59 AM

file_437778.txt

Here's the material file. As usual, remove the .txt file extension and save it in your Materials library folder.

The PM:Adjust_Width node controls the width, but I didn't bother to invert it, so value 20 gives a 0.1 width cross, value 10 gives a wider 0.2 width cross, value 5 give 0.4, etc. Just play with it, and you'll see.

"If I were a shadow, I know I wouldn't like to be half of what I should be."
Mr Otsuka, the old black tomcat in Kafka on the Shore (Haruki Murakami)


ima70 ( ) posted Sun, 23 August 2009 at 12:00 PM

Just create an square new image in photoshop gimp or whatever you use, paint it black then take a solid brush and paint white the shape you want the light save as jpg, select your light, go to the material room and atatch this image to the difuse channel of the light.


ima70 ( ) posted Sun, 23 August 2009 at 12:08 PM

file_437781.jpg

Maybe this is usefull for you


ViperKilzz ( ) posted Sun, 23 August 2009 at 12:31 PM

Thank you both, We'll see which on works better for me

R I P MJ. He's must have needed an Angel escort in Farrah

Please spay and neuter your pets. Strongly consider shelter adoption before spending $500 to $1000. If you MUST part with that kind of money for a pet, go to your local shelter, donate the money to them and pickup a highly adoptable pet. The shelters could sure use the donation.


IsaoShi ( ) posted Sun, 23 August 2009 at 12:53 PM

file_437787.jpg

> Quote - Thank you both, We'll see which on works better for me

I would be inclined to use a transparency map as ima70 suggested.
But if you really prefer to use a procedural, here's an alternative.

"If I were a shadow, I know I wouldn't like to be half of what I should be."
Mr Otsuka, the old black tomcat in Kafka on the Shore (Haruki Murakami)


ViperKilzz ( ) posted Sun, 23 August 2009 at 2:20 PM

Hi guys,

This might be a stupid ? but where does the procedural get connected? and you need a prop behind it to get the effect right?

R I P MJ. He's must have needed an Angel escort in Farrah

Please spay and neuter your pets. Strongly consider shelter adoption before spending $500 to $1000. If you MUST part with that kind of money for a pet, go to your local shelter, donate the money to them and pickup a highly adoptable pet. The shelters could sure use the donation.


IsaoShi ( ) posted Sun, 23 August 2009 at 2:51 PM · edited Sun, 23 August 2009 at 2:51 PM

file_437792.jpg

I'm sorry, that's my fault. I did it as a shader on a Poser surface instead of a Light.

You plug the output directly into the Color of the Light node, as in the above pic.
Yes, there needs to be a backdrop of some sort in the scene to catch the light and shadow.

"If I were a shadow, I know I wouldn't like to be half of what I should be."
Mr Otsuka, the old black tomcat in Kafka on the Shore (Haruki Murakami)


ima70 ( ) posted Sun, 23 August 2009 at 3:42 PM

file_437796.jpg

I couldn't resist doing my test render, :-)


IsaoShi ( ) posted Sun, 23 August 2009 at 5:09 PM

file_437803.jpg

Zlata just wouldn't go nekkid. :O)

"If I were a shadow, I know I wouldn't like to be half of what I should be."
Mr Otsuka, the old black tomcat in Kafka on the Shore (Haruki Murakami)


pokeydots ( ) posted Sun, 23 August 2009 at 9:07 PM

IsaoShi, how do you get the V_ and U_  Texture  coordinates in your  nodes? As in your image? Thanks :)

Poser 9 SR3  and 8 sr3
=================
Processor Type:  AMD Phenom II 830 Quad-Core
2.80GHz, 4000MHz System Bus, 2MB L2 Cache + 6MB Shared L3 Cache
Hard Drive Size:  1TB
Processor - Clock Speed:  2.8 GHz
Operating System:  Windows 7 Home Premium 64-bit 
Graphics Type:  ATI Radeon HD 4200
•ATI Radeon HD 4200 integrated graphics 
System Ram:  8GB 


pokeydots ( ) posted Sun, 23 August 2009 at 9:08 PM

Oops! Nevermind, I found it  ;o)

Poser 9 SR3  and 8 sr3
=================
Processor Type:  AMD Phenom II 830 Quad-Core
2.80GHz, 4000MHz System Bus, 2MB L2 Cache + 6MB Shared L3 Cache
Hard Drive Size:  1TB
Processor - Clock Speed:  2.8 GHz
Operating System:  Windows 7 Home Premium 64-bit 
Graphics Type:  ATI Radeon HD 4200
•ATI Radeon HD 4200 integrated graphics 
System Ram:  8GB 


ViperKilzz ( ) posted Mon, 24 August 2009 at 10:48 AM

IshaoShi> Thank u sooo much. The only roblem I am Having is I cany seem to get more of the cross to show. I have raised the light on the "y" axis, however if I raise it too high the shadow on the floor isnt as crisp. Any suggestions?

R I P MJ. He's must have needed an Angel escort in Farrah

Please spay and neuter your pets. Strongly consider shelter adoption before spending $500 to $1000. If you MUST part with that kind of money for a pet, go to your local shelter, donate the money to them and pickup a highly adoptable pet. The shelters could sure use the donation.


IsaoShi ( ) posted Mon, 24 August 2009 at 1:49 PM

file_437848.jpg

Can you show what you mean, VK? Which shader are you using?

If you make the start angle the same as the end angle, there will be no fading at the edges (as in the image above). I don't know how useful this will be, though. You may be better off using a transparency map.

"If I were a shadow, I know I wouldn't like to be half of what I should be."
Mr Otsuka, the old black tomcat in Kafka on the Shore (Haruki Murakami)


ViperKilzz ( ) posted Mon, 24 August 2009 at 9:23 PM

R I P MJ. He's must have needed an Angel escort in Farrah

Please spay and neuter your pets. Strongly consider shelter adoption before spending $500 to $1000. If you MUST part with that kind of money for a pet, go to your local shelter, donate the money to them and pickup a highly adoptable pet. The shelters could sure use the donation.


IsaoShi ( ) posted Tue, 25 August 2009 at 6:33 AM · edited Tue, 25 August 2009 at 6:35 AM

VK, that image uses the transparency map, right?. Not a procedural shader (which does not use image maps).

(Btw, you should have credited ima70 for the transmap, not me!)

But no matter. Looks good to me. Is anything there not the way you wanted it?

I might have been inclined to move the spotlight further away and reduce the spread a lot. This would have the effect of reducing the 'taper' on the lower part of the cross projection, as well as including the three upper ends of the cross. But it isn't my picture, it's yours!

"If I were a shadow, I know I wouldn't like to be half of what I should be."
Mr Otsuka, the old black tomcat in Kafka on the Shore (Haruki Murakami)


Khai-J-Bach ( ) posted Tue, 25 August 2009 at 6:40 AM

or you could use 8 prop planes arranged to give the Cross shape and put that infront of a light - known as a Gobo - http://en.wikipedia.org/wiki/Gobo_%28lighting%29

just another Technique in the pot ;)



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