> For the complete documentation index, see [llms.txt](https://www.blenderguppy.com/add-ons/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://www.blenderguppy.com/add-ons/random-flow/functions/shading/append-materials.md).
# Append Materials
This operator appends preset materials to the scene. They use my own grunge shader node groups to create grunge effects on the material.
Figure 1
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*Preview images below are not image textures but the result of the materials added to a plane.*
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These materials are prefixed with "rflow\_" for easy query and identification and for now are:
### rflow\_cloth
This is the grunge shader I use for cloth models particulary ones created using the **Panel Cloth** operator in **Random Flow**.
Figure 1
### rflow\_glass\_cylinder
I use this for cylinder objects mostly when I model some scifi canisters but it can also be used for other designs.
Figure 2
### rflow\_metal
This is the base of some of the other materials in the set and is not using any images for additional details like texture or bumps.
Figure 3
### rflow\_panel\_hard\_obj / rflow\_panel\_hard\_uv
This is using the **rflow\_metal** material setup but image textures has been added for additional detail. It uses one of the two 4k images I have baked using Random Flow. These come in two versions, with one using UV mapping and the other using Object mapping.
Figure 4
### rflow\_panel\_soft\_obj / rflow\_panel\_soft\_uv
This is using the **rflow\_metal** material setup but image textures has been added for additional detail. It uses one of the two 4k images I have baked using Random Flow. These also come in two versions, with one using UV mapping and the other using Object mapping.
Figure 5
These materials serves as a template you can freely modify. They can also serve as preview materials for quick renders if you plan to use other shaders later on.
Figure 6
In Figure 6, you can see that after the details are done using Random Flow the model can be quickly previewed using material shaders in render.
Figure 7
Having the grunge effects so easily achieved using my own shader nodes allows you to render your models much more convincingly.
Figure 8
This will allow you to create concept art or production pieces with less effort so you can let your imaginations run wild.
{% hint style="info" %}
*In my YouTube videos, these materials are assigned to the mesh using Creative Flow's Assign Material operator but without this add-on you can always add them to the mesh manually.*
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