Particle color(shader) using particle attributes

[Tom]

Hi, I would like to know how I can render particle color with ramp using Life attribute from particles, but I want to do this with shader not coloring particles itself, so I can save some memory from particles.

I usualy do this by adding color POP in particle network and change color to Ramp and lookup to Life.

Thanks in advance,

Tom

[symek]

Hi, I would like to know how I can render particle color with ramp using Life attribute from particles, but I want to do this with shader not coloring particles itself, so I can save some memory from particles.

I usualy do this by adding color POP in particle network and change color to Ramp and lookup to Life.

Thanks in advance,

Tom

You can make the age a real attribute manually in SOPs (otherwise it's a first component of life[2]), and use it in a shader. So in VOPSOP/POP, you add normalized attribute nAge = age/life, and down the chain in a shader, create the parm nAge to drive your ramp with it.

[Tom]

You can make the age a real attribute manually in SOPs (otherwise it's a first component of life[2]), and use it in a shader. So in VOPSOP/POP, you add normalized attribute nAge = age/life

Ok, this is easy...

, and down the chain in a shader, create the parm nAge to drive your ramp with it.

Now I quite dont understand this. I tryed to make this but it didnt worked. Could you make a simple .hip?

Shaders are real pain (for me) when it comes to modifying them

Edited March 3, 2012 by Tom

[symek]

Here you go, as easy as can be. This is H12 hip file.

ramped_age.hipnc

[Tom]

Here you go, as easy as can be. This is H12 hip file.

Thanks! I actualy failed on exporting VOPSOP attribute, I did it with Parameter node with Export on Always

My shader workflow was same as in your example.