Gradient Material

[Syllogism]

Hey guys

Can one modify the bulge material to make gradients? Been trying but not much luck.

A nice gradient material sure would be nice, with ability for multi colour gradients, rotation, circular, etc. And also to specify high colour ranges like sunlight as opposed to just white.

Wouter

[joe_b]

Gradient Material

There currently is no ramp UI for a ramp procedural texture. Its rather complex and will not be feasible to hook up before our planned release date

[edit]
You can kinda get a gradiant if you use a noise texture with the Marble w/ Perlin and 1 octave. I'm not exactly sure of how to get a straight up graidant with it, but I have done it before. I'll keep playing around with it. I'm not sure if this is enough for you though.

[flipside]

Gradient Material

If you want high color ranges, you should increase the texture multiplier.

[Syllogism]

high ranges

If you do that don't you also increase the bightness of the other tones also? So your blacks will become grays etc... this defeats the purpose since it will still give you a linear light ramp as opposed to very dark areas and very bright areas?(as one has in hdri's)

[Micha_cg]

Gradient Material

... you should set the color at black befor, the texture multiplier is not a multiplier, it's blend option. I'm not a friend of the hidden blend option, every new user will ask for that function. It's not self exlaining.

[joe_b]

Gradient Material

Its just the way the V-Ray plugins work. We'll have to be clear on what the multipliers do in our documentation.

[Micha_cg]

Gradient Material

Joe, what is the formula for the blend option? This here?

output color = color * (1/multiplier) + texure * multiplier

[joe_b]

Gradient Material

Joe, what is the formula for the blend option? This here?

output color = color * (1/multiplier) + texure * multiplier

final_color = color*(1.0f-blend)+texColor.color*blend;

So a mulitplier of 1.0 uses the texture color only
Multiplier of 0.0 uses the color only
Multiplier of 0.5 mixes both evenly

Now this is the case for most texture multipliers( Diffuse texture / Reflection Texture / Refraction Textures / Emissive Textures ). Bump texture multipliers and GI / background texture multipliers are just straight up multipliers

[Micha_cg]

Gradient Material

Joe, what is the formula for the blend option? This here?

output color = color * (1/multiplier) + texure * multiplier

final_color = color*(1.0f-blend)+texColor.color*blend;

So a mulitplier of 1.0 uses the texture color only
Multiplier of 0.0 uses the color only
Multiplier of 0.5 mixes both evenly

Now this is the case for most texture multipliers( Diffuse texture / Reflection Texture / Refraction Textures / Emissive Textures ). Bump texture multipliers and GI / background texture multipliers are just straight up multipliers

Thank you Joe.

In my last test release, the texture preview show not the right blend effect. If I set the multiplier at 0.5 the texture preview is washed out. Is ok so, but if I set the color at red, the texture preview stay grey washed out. Some thing dosn't work right.

[joe_b]

Gradient Material

The plane used for texture previews has a white diffuse color. Thats why its washed out. Changing the diffuse color in the material editor does not affect the plane color in the texture editor. I guess I should hook it up that way