I AM NIGHTMARE PRODUCTION DIARY #16

We're getting close to the end now as today I start the process of animating the films final sequence. 213 shots to go before this thing is in the bag- 1,224 down- 213 to go-

I cut the films teaser trailer and are now rendering out the shots that are used in the trailer-

Once the renders are done which I'll guess will be sometime around the weekend- then I'll shine up a few other things and release the trailer along with some new stills etc-

The render PC that you all bought for me is a champ- going 24/7 eating through the renders with no problems at 4.5ghz

BUT thats not to say that there haven't been any difficulties 0_o

Since I jumped into animation so fast with a new workflow wherein I don't do any final renders until the whole film is animated I met with some new workflow problems which took MANY head exploding hours to resolve but I was able to resolve them after about 30 hours and two separate days of me pounding my head on the desk-

So I've animated 1,224 shots right- now I didn't many render tests of the characters and the sets I'm using- I did a couple and ASSUMED everything was fine- I was wrong 0_o

Problem #1: Without me realizing it several of the materials I was using in the sets had an old "dirt" shader in their diffusion channel- so when rendered the materials would flicker like crazy AND cause an error to popup upon scene launch in R13 which I'm doing the rendering in

Option#1: Open every shot and manually remove the shader from every material- that would be about 6 materials per shot in 1,224 shots- thats a lot of clicks and a lot of time

Option#2: Create a script that does it automatically- I'm no coder and am a copy paste hack at best when it comes to scripting in c4d- BUT after MANY hours of research and desperation I found a python script on cineversity I was able to modify after a nice guy on Cgsociety gave me the important piece of code- here is the Python script to remove the "Dirt" shader from a scene OR any shader you choose- all you need to know is its name and replace "Dirt" with its name
--------------------

import c4d, os

############################################################
# recursive function where we do stuff to the shaders
############################################################
def shadertree(shader):
    # Loop through the BaseList
    while(shader):
       
        # This is where you do stuff
        print shader.GetName()
        if shader.GetName()=="Dirt":
            shader.Remove()
        # If it's a bitmap, we'll look at the filename
        if shader.GetType() == c4d.Xbitmap:
            filename = shader[c4d.BITMAPSHADER_FILENAME]
            print filename
            # for instance we can set the filename to just the file part
            filename = os.path.basename(filename)
            shader[c4d.BITMAPSHADER_FILENAME] = filename
       
        # Check for child shaders & recurse
        if shader.GetDown(): shadertree(shader.GetDown())
        # Get the Next Shader
        shader = shader.GetNext()
       
############################################################
# main function
############################################################
def main():
    # Get the first material
    mat = doc.GetFirstMaterial()
    # Loop through materials
    while(mat):
        # Get the first shader
        # Note - this is a 4D list - you've gotta GetDown
        shd = mat.GetFirstShader()
        # Use our recursive function to parse the shader tree
        shadertree(shd)
        # Get the Next material
        mat = mat.GetNext()

if __name__=='__main__':
    main()

------------------------

So now all I do is open a shot and execute that script and the dirt shaders are dead!

Problem#2: This one was far more annoying and time consuming 0_o So after animating those 1,224 shots I noticed that most of the characters textures looked dull when doing test renders for the trailer- I use a Fresnel shader with a modified gradient and parameters in the materials Luminance, Transparency, and Reflection channels to get the look.

So I'd had all these characters animated and they each have about 8 materials applied and NONE of them had the Fresnel shaders in their material channels 0_o

Option#1: For all 1,224 shots I'll have to manually copy paste the correct Fresnel shader in every shader channel for every character 0_o I did this for the 22 shots used in the trailer and it SUCKED and if I had to do it for every shot we're talking hours and hours and thousands of clicks

Option#2: Create a script that does it automatically

I had copy/paste hacked together a coffee script to activate/deactivate material channels and change material parameters a month or so go when discovering a bunch of textures had the wrong parameters- so I had this script here to fix that

My script is much longer as I'm modifying 40-50 materials
-------------------

var mat = doc->GetFirstMaterial(); //Get The first Material
if(!mat)return; //Error handling if no materials exist
while(mat)
{
if(mat->GetName() == "Fran face") // Look for the name "Fran face"
{
mat->SetBit(BIT_ACTIVE); // Set it as active
mat#MATERIAL_LUMINANCE_BRIGHTNESS = .30;// set color to white
mat#MATERIAL_LUMINANCE_TEXTURESTRENGTH = .30;
}
if(mat->GetName() == "chest3") // Look for the name "chest3"
{
mat->SetBit(BIT_ACTIVE); // Set it as active
mat#MATERIAL_USE_LUMINANCE = TRUE;
mat#MATERIAL_LUMINANCE_BRIGHTNESS = .15;// set color to white
mat#MATERIAL_LUMINANCE_TEXTURESTRENGTH = .15;
mat#MATERIAL_LUMINANCE_TEXTUREMIXING = 3;
mat#MATERIAL_USE_TRANSPARENCY = TRUE;
mat#MATERIAL_TRANSPARENCY_BRIGHTNESS = .10;// set color to white
mat#MATERIAL_TRANSPARENCY_TEXTURESTRENGTH = .13;
mat#MATERIAL_TRANSPARENCY_TEXTUREMIXING = 3;
mat#MATERIAL_TRANSPARENCY_FRESNEL = FALSE;
mat#MATERIAL_TRANSPARENCY_EXITREFLECTIONS = FALSE;
mat#MATERIAL_USE_REFLECTION = TRUE;
mat#MATERIAL_REFLECTION_BRIGHTNESS = 1;// set color to white
mat#MATERIAL_REFLECTION_TEXTURESTRENGTH = .29;
mat#MATERIAL_REFLECTION_TEXTUREMIXING = 3;
mat#MATERIAL_REFLECTION_ADDITIVE = FALSE;
}
if(mat->GetName() == "blackwood") // Look for the name "blackwood"
{
mat->SetBit(BIT_ACTIVE); // Set it as active
mat#MATERIAL_USE_DIFFUSION = FALSE;
}
mat = mat->GetNext(); // Get the next material if name is not found
}
---------------------

So I already had that script- so yesterday I though since I could already locate, activate and modify a materials channel with this COFFEE script I should be able to add a Fresnel shader to the channel-

Well I grinded for 8 hours yesterday trying to do this in coffee when I found it thats its not possible in Coffee and I'd have to use Python- So I picked my brain up off the desk and went at it-

I was able to figure out how to add a Fresnel Shader to a desired channel in the first active or selected material pretty quickly but I couldn't get the search thing to work- so the script would search for specific materials by name and add channels to those-

I asked for help on CgSociety and this pretty c00L guy Niklas whipped up a python script up for me real quick- I sent him a paypal tip and exhaled ^_^

I modified the script a bit after actually starting to understand how to use the Python SDK a little bit and now it works exactly as I'd like it too- here is the script- again, my script is much longer as theres a ton of materials to change- this one has two examples- all you have to do is add your own names and copy paste the repetitive bits

------------

import c4d

gra = c4d.Gradient()
gra.InsertKnot(c4d.Vector(1.0), 1.0, 0.0)
gra.InsertKnot(c4d.Vector(0.0), 1.0, 0.3)
sha = c4d.BaseShader(c4d.Xfresnel)
sha[c4d.SLA_FRESNEL_GRADIENT] = gra

mat = doc.SearchMaterialInc('chest3')
mat.InsertShader(sha)
doc.AddUndo(c4d.UNDOTYPE_NEW, sha)
doc.AddUndo(c4d.UNDOTYPE_CHANGE_SMALL, mat)
mat[c4d.MATERIAL_LUMINANCE_SHADER] = sha
mat[c4d.MATERIAL_REFLECTION_SHADER] = sha
mat[c4d.MATERIAL_TRANSPARENCY_SHADER] = sha
mat.Message(c4d.MSG_UPDATE)
mat.Update(True, True)

gra = c4d.Gradient()
gra.InsertKnot(c4d.Vector(1.0), 1.0, 0.0)
gra.InsertKnot(c4d.Vector(0.0), 1.0, 0.3)
sha = c4d.BaseShader(c4d.Xfresnel)
sha[c4d.SLA_FRESNEL_GRADIENT] = gra

mat = doc.SearchMaterialInc('L THIGH')
mat.InsertShader(sha)
doc.AddUndo(c4d.UNDOTYPE_NEW, sha)
doc.AddUndo(c4d.UNDOTYPE_CHANGE_SMALL, mat)
mat[c4d.MATERIAL_LUMINANCE_SHADER] = sha
mat[c4d.MATERIAL_REFLECTION_SHADER] = sha
mat[c4d.MATERIAL_TRANSPARENCY_SHADER] = sha
mat.Message(c4d.MSG_UPDATE)
mat.Update(True, True)

c4d.EventAdd()
-------------------------

So now that I have those three scripts- prepping my 1,400 shots won't be a total nightmare ^_^ Its just CLICK CLICK CLICK!

I keep telling myself I'm going to stop and take the time to REALLY understand Python but I never do- so when I need it I'm still all DUH DUH- there's NO EXCUSE not to learn with awesome free resources like Code Academy but when I want to sit and learn programming then I'll start on a new screenplay or make music 0_o

I believe the animated filmmakers of tomorrow will be fluent in languages like Python and C as if the creative tools don't meet their needs they will just create their own- how awesome is that?! ^_^

Well yeah so I had my little struggles and battles with the code but I got it DONE so now I can just put my energy into storytelling and animation so I can make I AM NIGHTMARE is the best film I can make!

For now I'm going to prep the dialogue for lip sync for this final sequence and get to it!





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