Is it possible to emit particles where the white part of testure?

In maya, we can emit particles from texture. If I make a dynamic texture, I can emit from dark or white.

Can somedoby help me?

You sure can,

I normally use a pic expression to get colour data onto the primitives you emit your particles from, and then reorder the primitives (or points) to get the emission based on a certain axis. You can either use the colour attribute for emission or just delete the parts that don't get used for emission according to a certain threshold, merging them back together after the popnet.

Hope this helps

Cheers Coen

Hi,

Here's a video tutorial [sidefx.com] that should help you.

Also, please search through the forum with these keywords: “particle AND color” or “particle AND texture” and check “Search for all terms”. You should get quite a number of posts regarding this topic.

Cheers!
steven

Hi there is anotehr way of doing this. I attached a file. I use a vopsop to generate a attribute onto scattered points that I can later use in a delete sop. this is quite fast and I can use this points as source for my particles.
have a look it it works for You .

Martin

PS: Ieek, empty space in the filename !! ops:

hi all,

I realized what you guys meant. But my problem is similar like how to paste sequences in UVs and use white part to emit particles.

Here is a sample file of sequences.

I know where is my problem.

It works when I re-start my houdini. ops: