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Question by giulio-pierucci · Apr 15, 2015 at 11:34 AM · shader

Shader texture parameters default value

Hi guys,

according to Shaderlab reference, i know i can initialize a texture 2d parameter in this ways:

"For texture (2D, Rect, Cube) the default value is either an empty string, or one of built-in default textures: "white", "black", "gray" or "bump"."

When a material have a texture 2d property set to "none", the value is set to default (white, black, etc.)

I discovered that "red" is a valid initializer, but i see that red is = "1,0,0,0", but we needs "1,0,0,1".

"White", instead is "1,1,1,1".

Someone knows how to inizialize a texture 2d with custom color values?

We currently using Unity3D 4.6.4

Thanks a lot

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avatar image giulio-pierucci · Apr 16, 2015 at 09:36 AM 0
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Additional informations:

Our goal is a material that is red (alpha=1) without a texture.

avatar image giulio-pierucci · Apr 21, 2015 at 08:16 AM 0
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Another note :

Other colours like Blue or Green don't works. Only Red (and other references colours ) seems to be syntactically correct

Thanks for any help

avatar image Baste · Apr 21, 2015 at 10:58 AM 0
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From what I can see, there's only the built-in values to select from - what they seem to do is to pick a (hidden) placeholder texture to use when no texture is set.

The only solution I can think of is to create a custom inspector for the shader (see here), and have it assign a placeholder texture with the correct values on awake, if no texture is set.

avatar image Baste · Apr 21, 2015 at 10:59 AM 0
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you could also try to track down the placeholder textures used. They're probably somewhere in the Unity install - unless they're temporary textures created dynamically when Unity starts up.

avatar image giulio-pierucci · Apr 21, 2015 at 11:01 AM 0
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Thanks a lot baste. Change your comment to answer, I'll give you +1

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