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View Full Version : Advanced per Light Shadow controls, Color Gradients, Fall off types etc



Infinite
01-27-2010, 05:41 AM
Im not sure it is worth posting here (what with CORE being developed) but having access to shadow color control per light would be amazing. Similar to Evasion 3D's Shadow Designer.

http://www.evasion3d.com/sd_lw_prodinfo.html

Having the ability to control fall off amounts, how the shadows are applied, multiplied, additive, color gradients on fall offs with alpha settings. You name it. Some kind of node plug-in to a light?

Is this a pipe dream

dpont
01-27-2010, 12:21 PM
A shadow falloff is doable on a shader basis,
like in this modified Shadows node with different
soft shadows falloff distance,

81511 81510 81512

Coloring shadows, yes but blending with
a gradient node and a distance can't be
blended inside the illumination shading
process,

81513

Denis.

dpont
01-27-2010, 01:49 PM
In fact a shadows gradient mixed with illumination
model is also doable,
but as you can see 3 outputs related to soft-shadows
has a terrible cost, render time is multiplied by 3.

81521

Denis.

Infinite
01-28-2010, 07:06 AM
Thanks for the reply Denis. I am also working with Simple Skin so not sure how compatible your nodes are with that Node and I guess not compatible at all with FPRIME?

My goal is to try and mimic this:

http://www.youtube.com/watch?v=-IC5fbBj9e0&feature=related (http://www.youtube.com/watch?v=-IC5fbBj9e0&feature=related) Skip to 0:30. The red shadow bleed that can happen on skin from a bright light source.

After some experimetning and some tips by my good friend Pooby. I tried using a couple of lights together and mixing their properties. First setup is one Area light that is turqoise and large set to about 120% a second Area light that is Red smaller and set to about 50%. This can produce the kind of bleeding edge I was after but it isnt perfect, and youget a turqoise banding edge:

http://www.ir-ltd.net/uploads/shad-01.jpg

There's also another trick for what I am after which is using 2 lights again, 1 bright white Area light small, and another set to -100% black with turqoise shadows. But again the results arent great, plus I prefer to use FPRIME.

But a solution to control each lights shadow output would be great in the future even in CORE.

I messed about with your Nodes before hand (very cool and powerful) but couldn't quite get what I needed.

OnlineRender
01-28-2010, 12:16 PM
models wicked !