Baking Point Clouds from RSL

[saml]

Hi,

I am unable to generate a point cloud file from an RSL shader within Houdini to be used for SSS. I may be using the wrong workflow but when I render out my RIBs from the renderman ROP, the RIB file is created successfully but it is not generating the .ptc file.

The shader I have applied to my geometry to bake out a .ptc file is as follows:

surface bake_radiance_t(

string filename = "$HIP/maps/sss.ptc",

displaychannels = "_area,_radiance_t";

color sc = 1)

{

color irrad, rad_t;

normal Nn = normalize(N);

float ar = area(P, "dicing");

/* Direct Illumination (ambient and diffuse) */

irrad = sc * ambient() + diffuse(Nn);

/* Store in point cloud file */

bake3d(filename, displaychannels, P, Nn, "interpolate", 1,

"_area", ar, "_radiance_t", irrad);

Oi = Os;

Ci = irrad * Os;

}

Are there any specific settings I have to apply in Houdini for ptc's? Thanks in advance for any assistance to resolve this!

Sam.

[Alanw]

Have you specified AOV's on your RenderMan ROP for those channels?

[saml]

Have you specified AOV's on your RenderMan ROP for those channels?

Thanks Alan, that fixed the problem. I hadn't included the channels in the AOV's.