HOW TO: Decals or mixing materials by images

[WilliamNoppen]

Dear all,

Upfront my apologies for a possible dumb question. Still learning every day.

After three days of trying, buying and watching Inlifethrill's training i can't get my head around the following:

I need to make an emoji/smiley. I create a yellow glossy material. On the same sphere i have to layer/place the eyes and mouth which is a PNG or TIFF with transparency.

I got it to work in C4D only but in no way i can find out to do this in Octane. Am i missing some sort of 'Alpha" check box which C4D uses? Do i need to render out a separate black/white picture as a matte?

Any help will be much obliged.

William.

[aoktar]

check this

[WilliamNoppen]

Many thanks Ahmet,

Although you used a black/white png i think i can track back the procedure of applying a png/tif file in full color.

[johnny1k]

Sorry to dig up this old thread, but I have a related question.

I also want to apply a decal to an object by mixing two materials, but the mapping for the base material should be uv and the one for the decal xyz(planar). If I was using an image texture this can be easily done by using the projection node. In my case though, I want to use a procedurally generated c4d gradient as alpha (For instance to fade an objects material to different one at at a certain height.).
From what i understand c4d shaders are converted to textures at render time, so shouldn't it be possible to transform/project them as such?

Thanks for your help!

[hausgross]

Sorry to dig up this old thread, but I have a related question.

I also want to apply a decal to an object by mixing two materials, but the mapping for the base material should be uv and the one for the decal xyz(planar). If I was using an image texture this can be easily done by using the projection node. In my case though, I want to use a procedurally generated c4d gradient as alpha (For instance to fade an objects material to different one at at a certain height.).
From what i understand c4d shaders are converted to textures at render time, so shouldn't it be possible to transform/project them as such?

Thanks for your help!

You could prerender the procedural C4D texture and apply it in a Octane material like any other texture or use the Baking Texture node. The Baking Texture node is less performant than a prerendered texture, but in complex scenes where the procedural texture reacts to the animation and needs to update it may be well worth the performance hit - and it works pretty automatic.