Quotation "Premultiplied vs. Un-Premultiplied Color Channels"

quote from Technical Introduction to OpenEXR.

Premultiplied vs. Un-Premultiplied Color Channels
The A, AR, AG, and AB channels in an OpenEXR image represent alpha or opacity: 0.0 means the pixel is
transparent; 1.0 means the pixel is opaque. By convention, all color channels are premultiplied by alpha,
so that
composite = foreground + (1-alpha) × background

performs a correct "over" operation.
Describing the color channels as "premultiplied" is a shorthand for describing a correct "over" operation.
With un-premultiplied color channels "over" operations would require computing
composite = alpha × foreground + (1-alpha) × background

"Premultiplied" does not mean that pixels with zero alpha and non-zero color channels are illegal. Such a
pixel represents an object that emits light even though it is completely transparent, for example, a candle
flame.

Mesh Motion Blur Defomer for Maya

I made a motion blur plug-in for Maya in previous project.

A particle trail node plug-in for Maya

I've made a particle trail node plug-in for Maya.
It has been adding new function and fixed bug.
It has an error when using Mental Ray batch render.

Error: (Mayatomr.Geometry) : unnamed object is not a mesh, ignored Fix it.

I might release it.

Sine wave pattern

A sine wave pattern expresses:
position = (sin(frequency * frequency multiplier) * amplitude) + offset

A display of velocities in the nuke

Read the realflow particle bin file

Read the realflow mesh bin file

I've made a plug-in for the nuke.
It can read a bin mesh and bin particle file format of the realflow directly.

Ambient Occlusion for maya2008 version was out

I got request for maya 2008 version. It was released.
It can download below.
http://www.creativecrash.com/maya/downloads/shaders/c/ambient-occlusion-for-maya-software

Let's me know if you have problem.

Enjoy!!

Ambient Occlusion for maya2011 version was out

Ambient Occlusion for maya2011 32bit & 64bit version was released.
It can download below.
http://www.creativecrash.com/maya/downloads/shaders/c/ambient-occlusion-for-maya-software

Let's me know if you have problem.
Enjoy!!