Blur Image in Arnold Material

[brianswarthout]

Hello,

I'm working with some black and white images (brought in via "Image" node) as masks in an Arnold Standard Surface Material and am wondering if there is a way to slightly blur these masks within C4DtoA rather than doing so in an image editing application such as Photoshop?

I was playing around with adjusting the MIP mapping bias but am not sure if this is the correct approach.

Thanks!

- Brian

[peterDTE7K]

I believe there isn't such node and neither other render engines have such option. It would be really great to have it, I often need to blur textures for masking and bumps

[lee_griggs]

Increasing the mip-mapping bias will blur the texture in the image shader.

The redshift Blur.osl seems to work.

[daniel]

Rombotools offer a dedicated blur shader:

https://www.rombo.tools/2022/12/02/texture-blurrer/

[brianswarthout]

Thank you all for the quick and helpful replies! Much appreciated.

[alan_lamVGAMN]

Hi, Lee Griggs,

I tried the same way as what you mentioned in order to add a directional blur to the noise. 

When I apply the osl blur to the offset and connect the noise to diffuse or emission channel, it seems the outcome looks fine(same as yours).

However, if I plug noise to bump or displacement, the result in mtoa looks like error. I did the same exact steps in Redshift, the result is fine as expect.

I am trying to do the skin microstructure and looking for "directional blur" effect when the skin is sketch and compress.

maya 2024

I also developed another simple method to achieve directional blur by apply a noise to drive the offset. If use this way to diffuse and emission channel, the result looks good. However, also not good for bump and displacement.

I have attached a test scene in the thread. Welcome to have a look.

The actual logic behind is really simple. Just don't know why it works smoothly in Redshift and doesn't work the same way in MtoA.

Is it a bud?

Cheers...^_^.

Thanks in advance.