Map composed picture to sprites

[ITdreamer]

Hello, friends.

I have a sprites particles system. When I use a simple picture as a sprite, everything is Ok, color and alpha are good. Then I composed a simple noise in COP2 Network and tried to map it to sprites. In OGL viewport everything is OK, but my render is no (it has only squares in color and alpha from sprites). Please, explain what I made wrong? And the second question is: My noise in animated, and in every frame it is slightly different, so how can I map different noise in every sprite. Because now I how the same noise on every sprite in every frame.

Thanks a lot

P.S. Here is the simple scene, where I have these questions. Please, help me to fix them.

Sprites_Test.hip

[SpencerL]

Hello, friends.

I have a sprites particles system. When I use a simple picture as a sprite, everything is Ok, color and alpha are good. Then I composed a simple noise in COP2 Network and tried to map it to sprites. In OGL viewport everything is OK, but my render is no (it has only squares in color and alpha from sprites). Please, explain what I made wrong? And the second question is: My noise in animated, and in every frame it is slightly different, so how can I map different noise in every sprite. Because now I how the same noise on every sprite in every frame.

Thanks a lot

P.S. Here is the simple scene, where I have these questions. Please, help me to fix them.

Make sure is to assign the "Cd" and "Alpha" attributes in the Attributes parameter of the mantra: geo procedural SHOP.

[ITdreamer]

Make sure is to assign the "Cd" and "Alpha" attributes in the Attributes parameter of the mantra: geo procedural SHOP.

I did that. Maybe you can look at my scene?

[Jason]

I did that. Maybe you can look at my scene?

I didn't look at your scene - but are you using the op:/ syntax to map the COP image? If you are, be sure to set your COP image to 8bit (use the Convert COP, perhaps). There is a bug in Houdini which doesn't let floating-point images work in Mantra if using the op:/ syntax.

[ITdreamer]

I didn't look at your scene - but are you using the op:/ syntax to map the COP image? If you are, be sure to set your COP image to 8bit (use the Convert COP, perhaps). There is a bug in Houdini which doesn't let floating-point images work in Mantra if using the op:/ syntax.

Yes, I use "op://" to map color. I also tried to convert, but it didn't help.

[ITdreamer]

So, please, help me to fix that. The scene is very simple.

[shareu]

let`s go rendering!!!

ok! image

but this message is "Unable to load texture 'op:/obj/a/b/cop/out'"

please tell me why?

cop2shop.hip

Edited July 8, 2008 by shareu

[zbhoudini]

it looks strange,man,why don' you use vex layered surface shader to have a try?it works very well.