padding zeroes in vex

 s@frameNum= sprintf('%04d',clamp((@Frame-1000),0,68));

//s@name = sprintf('%04d',@Frame);

s@textureFile=chs("part1")+@frameNum+chs("end");

slight update on zero padding in vex...

use sprintf to reformat numbers..

cryptomatte arnold houdini

 

I always forget how to do cryptomattes in Arnold & Houdini

culling stuff camera

 string camera=chs("../camera");

vector campos=toNDC(camera,@P);

vector2 padding =chu("../padding");

if((campos.x+padding.x)<0||(campos.x-padding.x)>1||(campos.y+padding.y)||(campos.y-padding.y)){

        i@group_kill=1;}

matrix cam=optransform(camera);

vector camera_position=cracktransform(0,0,0,{0,0,0}, cam);

float distance =distance (camera_position,@P);

float threshold=chf("../distance");

if(distance>threshold){

        i@group_kill=1;}

instance ass files (not paths)

use instancefile to access geo saved somewhere...

in a point wrangle - 

  s@instancefile=chs("path");

now with the geo node, you gotta add the instance tab and turn on fast instancing.