V-Ray/Blender 2.5

[d_ray]

Re: V-Ray/Blender 2.5

for volumetric light or light rays do we have to use fog? i was trying to do it and i didnt find where.

thanks

[bdancer]

Re: V-Ray/Blender 2.5

for volumetric light or light rays do we have to use fog?

Yep, World -> Effects -> Fog

[d_ray]

Re: V-Ray/Blender 2.5

this is what i get. i guess i am using the wrong settings. i want the light to have light rays. so that it effects the fog.

[bdancer]

Re: V-Ray/Blender 2.5

d_boy, http://www.spot3d.com/vray/help/150SP1/ ... params.htm

In contrast to the native 3ds Max Volume Light atmospheric effect, VRayEnvironmentFog covers the entire volume specified by the Fog height parameter or the listed Gizmos - it's effect is not limited to the cone or area of influence of the particular lights that affect the fog.

So I guess this is how it works, but may be I'm just missing smth...

[d_ray]

Re: V-Ray/Blender 2.5

this is what i want to do in vray. light god rays. so its possible to do this in vray.
http://www.vrayonline.com/vray/english- ... ffect.html

http://www.spot3d.com/vray/help/150SP1/ ... cs_off.png

i remember that someone posted a render with light rays from blender/vray. but i can not find it.

[bdancer]

Re: V-Ray/Blender 2.5

d_boy, on renders you show there is a spot and a direct light - why then you use sphere light? =)

[d_ray]

Re: V-Ray/Blender 2.5

i thought it works with al llights? so it doesnt work with are and sphere lights?

well i also tryed with direct light and it didnt work. can you please show your settings in your last render? thanks

[bdancer]

Re: V-Ray/Blender 2.5

i thought it works with al llights? so it doesnt work with are and sphere lights?

It works with all lights, but if you want a beam then use lights that has a beam or cone =)
Scene attached, settings are low, just for test.

[d_ray]

Re: V-Ray/Blender 2.5

thank you for the file. its not working so now i know that the problem is on my computer. i hope i will find a fix

[StieMO]

Re: V-Ray/Blender 2.5

its not working for me too. have win build with 1.6 vray

[renderdemon]

Re: V-Ray/Blender 2.5

Hi Bdancer,I tested a bit layered materials(last exporter with blender 2.5 and it seems they are not working well,the weights seem not working at all.
As far as I understand you export,for every material,a weight with a color statement(ex. COLOR( 1, 1, 1)) but it seems that it's not working in this way(maybe a vray bug), to work well the weights list needs a texture definition like this(example for a material with 3 sub mats)

TexAColor WEIGHT_Base {
texture=AColor(1.0, 1.0, 1.0, 1.0);
}

TexAColor WEIGHT_CoatA{
texture=AColor(0.5, 0.5, 0.5, 1.0);
}

TexAColor WEIGHT_CoatB{
texture=AColor(0.2, 0.2, 0.2, 1.0);
}

and in the layered mat(single material definition else where of course)

BRDFLayered BRDFLayeredMaterial {

brdfs= List(MAT_COAT_B,MAT_COAT_A,MAT_Base);
weights= List(WEIGHT_CoatB,WEIGHT_CoatA,WEIGHT_Base);
transparency= Color(0.000,0.000,0.000);
additive_mode= 0;
}
This is the only way I was able to blend material with different weight as I want.
Also the little flag to disable the individual material on the right it doesn't work.
It could also be useful if the base material were a bit more clearly defined visually.
Thanks you very much.

[bdancer]

Re: V-Ray/Blender 2.5

renderdemon, tnx! Fixed.

[renderdemon]

Re: V-Ray/Blender 2.5

Thanks bdancer,now it seems working better.
But I have found another little problem with layered materials.
When you use as submaterial BRDFSSS2Complex the overall color it's not exported correctly,because it uses as color the diffuse color (if I understand correctly) and not the one into the overall color slot that the user gives,so a material with fastsss as material gives different results if this is into a layered material or if it is a normal fastsss material(as I said previously it seems not exporting the overall color).
Apart from this,it seems to work as expected the layered mat.
Thank you very much for the blazing fast fix!

[bdancer]

Re: V-Ray/Blender 2.5

renderdemon, fixed.

[renderdemon]

Re: V-Ray/Blender 2.5

Thanks a lot !