- Create a new proyect in Mari.
- Create a new channel called “base”.
- Adjust size, color space and color.
- Right click on “base channel” to import a texture bitmap as base color.
- We already have our cube with the blue base color.
- Create a new shader called “blueCube” and choose as texture the “base channel” created before.
- Create a new channel called “underPaint”.
- Adjust size, color space and color.
- Right click on the “underPaint” channel to import a nice under paint texture map.
- You can see it in the viewport.
- Create another channel called “underPaintMask”.
- Adjust size, color space and color.
- Import the under paint mask texture into the “under paint channel.”
Looks awesome in the viewport.
- Select the “blueCube shader” and add a “new shader module”.
- Select “masked diffuse” from the list.
- As base texture select “underPaint channel”.
- As mask texture select “underPaintMask channel”.
- Invert the mask.
- Add more layers in very simple, just need to add more channels.
- Create a new channel called “rust”.
- Adjust the size, color space and color.
- Import a rust map into the channel.
- Check it in the viewport.
- Add a new channel called “rustMask”.
- Adjust size, color space and color.
- Go back to shaders tab and select “bluCube shader”.
- Add a new shader module and select “masked diffuse” from the list.
- Select the “rust channel” as “base texture” and “rustMask channel” as “mask texture”.
- Invert the mask.
- Select the “rustMask channel” and paint with black color to create rust in desired areas.