I found this (free) nice brick PBR material :

enter image description here

I would like to use it in Blender. I had never heard of PBR before. So when I unpack the zip, I get those files :

  • Brick_Wall.sbsar
  • Brick_Wall_D.tga
  • Brick_Wall_H.tga
  • Brick_Wall_N.tga
  • Brick_Wall_RMA.tga

I've understood that sbar is a property format and is not supported by Blender. So I have to build my own material using those textures.

enter image description here

I've read this tutorial to learn how to setup it.

I added a principled BSDF node and linked it like that :

  • Brick_Wall_D.tga > base color
  • Brick_Wall_H.tga > metallic
  • Brick_Wall_N.tga > (normal map) > normal

Is that correct ?

But then, I miss the roughness map. I read here that

RMA is a type of packed map which contains Roughness + Metallic + Ambient occlusion, which are used with PBR (Physically Based Rendering).

and here that you can extract channels in the node setup by using a "separate RGB" node.

Thus, what should I use and how should it setup that ? Maybe I should use only the RMA file ?

Thanks a lot.


You don't need the height map for this.. the normal map will work fine (make sure to add the vector Normal Map and make the image texture non-color).

The RMA works like this.. add the RMA image texture and then add a "Separate RGB" node. Each channel in the RMA is an input into your BSDF shader. Most of the time it's this...

  • Red = Ambient Occlusion (you can add this with a multiply on your Base Color if you want)

  • Green = Roughness

  • Blue = Metalic

I know this is an old question but maybe this will help others as this comes up early on Google for RMA and Blender.

  • 2
    $\begingroup$ just a quick one, RMA indicates also the order so R(R) => Roughness B(M)=> Metalness , G(A)=> AO. $\endgroup$ – cnisidis Apr 17 '20 at 16:09
  • $\begingroup$ For the other maps : (D)iffuse (= "base color" or "albedo"), (H)eight (=displace), (N)ormal $\endgroup$ – thibsert May 5 '20 at 15:11
  • $\begingroup$ I didn't know that about "RMA" as a term. Everything that comes out of Substance is as I descried above.. I'm not sure why. There really should be a standard for that... I guess that's the "RMA" thing. $\endgroup$ – user170023 May 6 '20 at 16:34

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