Script request- Vray material options rollout/ glossy rays

Why such a long code for this?
You can actually have a much shorter writing and it will work fine:

vraymat_array = (getClassInstances VRayMtl)
for m in vraymat_array do (
   if (hasProperty m "option_traceDiffuseAndGlossy") then m.option_traceDiffuseAndGlossy = 2
)

This should work

for i in scenematerials do
(
	if (classOf i) == VRayMtl then
	(
		i.option_traceDiffuseAndGlossy = 2
	)
	else if (classOf i) == VrayBlendMtl then
	(
		i.baseMtl.option_tracediffuseandglossy = 2
		if i.coatMtl != 0 then
		(
			for u in i.coatMtl do
			(
				if (classOf u) == VRayMtl then
				(
					u.option_traceDiffuseAndGlossy = 2
				)
			)
		)
	)
	else if (classOf i) == Multimaterial then
	(
		For u in i.materialList do
		(
			if (classOf u) == VRayMtl then
			(
				u.option_traceDiffuseAndGlossy = 2
			)
			else if (classOf u) == VrayBlendMtl then
			(
				u.baseMtl.option_tracediffuseandglossy = 2
				if u.coatMtl != 0 then
				(
					for j in u.coatMtl do
					(
						if (classOf j) == VRayMtl then
						(
							j.option_traceDiffuseAndGlossy = 2
						)
					)
				)
			)
		)
	)
)

Amazing job mate, thank you :) I def owe you a beer. Haven't tested it for the VrayBlend, but it works like a charm for multimaterials and vray materials. Thanks sooo much!!!

Thank you sooo much mate, it works like a charm. For each Vray material that is applied to an object in the scene, the 'treat glossy rays as GI rays' option is now automatically set to 'Always' after running the script- exactly what I wanted. You really helped me out a lot with this, I am truly grateful :)

I'm glad it did !

If you have heavy scene and script is low when executing you can use the code in the other comments. Thanks to vusta the operatiosn are conducted on scene materials directly instead of browsing trough objects.

Don't hesitate to contact me if you need something else.

Hey mate, thanks again for the great work; it helped me a lot. About the second version of the script, I can't get it to work :( Here's the error:

Error occurred in anonymous codeblock; filename: C:\Users\Hory\Desktop\New Archi\Setari Vray\alternative_glossyraysmodifier.ms; position: 64; line: 4
-- Type error: Material library index must be number or name, got: Default:Standard
-- MAXScript callstack:
-- thread data: threadID:4012
-- ------------------------------------------------------
-- [stack level: 0]
-- In i loop; filename: C:\Users\Hory\Desktop\New Archi\Setari Vray\alternative_glossyraysmodifier.ms; position: 65; line: 4
-- Parameters:
-- i: Default:Standard
-- Locals:
-- i: Default:Standard
-- Externals:
-- sceneMaterials: SystemGlobal:sceneMaterials : #materialLibrary()
-- owner: undefined
-- ------------------------------------------------------
-- [stack level: 1]
-- called from top-level

The first version you posted in this thread is great; eased my work quite a bit. However, I noticed that it does have some issues regarding multi/sub object materials (or blend material, I just noticed): for some materials in the stack, the 'treat glossy rays as GI rays' parameter gets set to 'Always' (as intended); whereas for others it just stays at the default settings ('only for GI rays'). Any ideea if it would be possible to fix this as well?

Many thanks again, mate!

I haven't tested the second version but i might know where it stucks.

For the blendMtl it is normal that no changes appears because the actual script is not looking inside blendMtl. But we could do something about it for sure !

I do not have access to any computer with 3ds max but I'll reach you on Monday.

For now this code should Work and you should look into the maxscript documentation in order to treat blendMtl.

for i in scenematerials do
(
if (classOf i) == VRayMtl then
(
i.option_traceDiffuseAndGlossy = 2
)
Else if (classOf i) == VrayBlendMtl then
(
i.mat1.option_tracediffuseandglossy = 2
i.mat2....
)
Else If (classOf i) == Multimaterial then
(
For u in i.materialList do
(
-- test If vray mtl or vray blendMtl again--
) 
) 
)

i'm actually writing it on m'y phone so There Will probably be some typing issues and i didn't tested it

Thank you again for doing this, mate!

I tested this script; unfortunately it gives the following error:

Error occurred in anonymous codeblock; filename: ; position: 199; line: 10
-- Syntax error: at .., expected
-- In line: i.mat2...

Any help would be much appreciated :)

Hello, Here is a piece of code that should do what you need. Feel free to test it and make me some feedback about it.

for i = 1 to objects.count do

(

if (classOf objects[i].material) == VRayMtl then

(

objects[i].material.option_traceDiffuseAndGlossy = 2

)

) 

in non programmer speak...

why are we counting objects when we should be counting vray materials ? so say we have 1 million objects, all assigned with the same vray material...why should we then do the same thing 1 million times ?

When you use either Slate Material Editor or compact One, scene materials might not be loaded so i usually go with scene objects and get their materials. In your example if i know i have 1 million objects and one vrayMtl, i'll probably won't need a script and i'll go change the material myself. BUT, you are right i don't want to do the same operations on materials that have already been trated. So i could go for something like :

• Creating an array which stocks the treated materials name
• When getting an objects material, checking if it has already been processed by comparing object's material's name with names in the array
• If Comparizon brings a match then do nothing
• If Comparizon brings nothing then process GlossyRays as Always

Is that of any help ?

now I'm not trying to be a smart ass...hence all these basic mxs questions..

what about this

for m in scenematerials do
(

check if m is vraymat
blah blah

)

does this not go thru your scene materials doesn't matter how many objects or what assignment combination there is...it simply works on materials ?

You are definitely right ! I wasn't aware of this scenematerials command and thought it would be related either to Slate or Compact Material Editor. I just checked this out and yeah it would perfectly work !

for i in scenematerials do
(

if (classOf scenematerials[i]) == VRayMtl then
 
(
 
scenematerials[i].material.option_traceDiffuseAndGlossy = 2
 
)


)

glad I made a contribution....cheers

(pure fluke tho...I just thought well let search for 'scene materials' and see what comes up...first one, Poly Count post...)