Hi, I would like to make a realistic sugar cube material procedural, but so far I couldn’t manage to get a satisfactory result, can you please help me improve it? or make a complete new shader , please see below my attempt, not good 
here is the file for shader
thanks
use voronoi with bumps
then add some uvspheres different size as a group
then use particles set to face for your cube
this should look more realist
happy bl
used voronui not only bumps but also for displacement modifier ( @PGmath 's suggestion from here), and got the result below, but still not feels realistic enough, esp there are too much noise even with 300 render samples
sorry but there is little noise in this render
bumps you looks like voronoi !
can you show nodes setup
may be upload s small sample file a few cubes
did u test the particles system it would looks more realist
do u have a reference pic so we can look at it
happy cl
like this ?
this method is very easy to use but it’s really slow
model just a few sugar grains and use a psys to distribute them inside a sugar cube (volume/grid)
^^ Yep - I tried that last night - but Blender crashed on me.
What I found works is to take a standard cube - then apply a particle system, distributed on the faces - keying off the sugar grain object(s).
Give them some random size and rotation.
I then applied a glass shader to the sugar grains themselves - with a white translucent shader on the underlying cube. Seemed to give a pretty good result, albeit a little slow.
yes too much noise is probably from SSS, it didn’t change much though even i render with 500 samples, I believe there might be a better option causing less noise, my current sugar blend file is here
and below is the node set up
(originally suggested by @PGmath from blender stack exchange)
I haven’t tried the particle system one yet, but I will do asap, I’m just not good at particles yet 
as a reference photo I’m aiming something like this
or this
thanks for helping btw
first thing don’t make you background white
should be greyish diffuse
did basic shape for cube with some voronoi
cube-white1.blend (231 KB)
~
over that can add some particles with Hair and object
did one with UV sphere but does not look
should be sort of squarish to make the group
might look better in render
happy cl
Attachments
thanks for the reply, I will try your method with particles, but can you please also explain a bit more what you meant by “use a pays to distribute them inside…”