More WIP on R3PU

[Patrice Terrier]

See this SketchFab link to download a low poly .obj version of the original model from Nika ZautashVili
https://skfb.ly/6A7UX

[Michael Lobko-Lobanovsky]

Looks very good indeed. But it uses a different, more modern texture+shader technique especially designed to render metal and plastic surfaces with picture perfect quality. Our ubershader won't be able to render this model so well even with all the necessary textures.

But still I'm eager to see how your model is going to look in the end.

[Michael Lobko-Lobanovsky]

Looks nice!

[Patrice Terrier]

Mike

I have posted the result of my work into the "Sciece fiction" collection.
Warning, due to the size of the project i had to create two posts, to fit everything 

BTW: I think that we can support the comparison with the SketchFab version, even if we are not using the latest texture+shader technique.

[Michael Lobko-Lobanovsky]

Very good!

But as I said, our conventional OpenGL shader can't render the model's "metalness" realistically enough. We need realtime PBR (physically based rendering) shaders and textures to do that.

[Michael Lobko-Lobanovsky]

BTW: I think that we can support the comparison with the SketchFab version ...

Regretfully no, Patrice.

Our current render cannot compare favorably with the SketchFab render the way the materials are currently defined in your .MAT file.

I want to experiment with the model and I think I can come up with much better ObjReader materials.

Note that some of your normal maps have a wrong normal UP direction and thus they exhibit peaks where cave-ins should have been. I don't know how you produced your helmet_4K_bump.png normal map (probably using the original b/w bump map in the nVidia plugin) but I need the same with the normal UP direction reversed. Can you provide me with one so I could experiment a little further?

[Patrice Terrier]

Mike

Here are those (unchanged) that were provided with the original downloaded from SketchFab.

Please remove the attachment once done.

I am looking forward to see what you come with your material file, and reworked textures.

BTW, i made a few enhancements in my personnal version, merging some meshes from the HP FBX version.

[Michael Lobko-Lobanovsky]

Thank you Patrice,

Attachments removed as requested.

I already have renders that have considerably better "metalness" than yours.   But let me finish before I submit my WIP to you.

I can prove that SketchFab is cheating; their model is rendered with normal maps different from everything that we can download from their site (.obj or proprietary). 

[Patrice Terrier]

I turned the kevlar helmet into a metal one.

[Patrice Terrier]

What about these

[Michael Lobko-Lobanovsky]

OK Patrice,

I did my best. My task was to render it as close to SketchFab as possible. I did much, but most normal maps are not the ones the site uses for its own renders. My biggest failure was to render the suit in "plastic leather", which is impossible with the current normal and specular maps.

The zip contains a new .MAT file. You can WinDiff it with the old one to see the differences. The zip also contains a lot of new textures needed for the new .MAT file. All of them begin with an underscore, so just unzip them all into your existing R3PU folder. They won't interfere with, or overwrite, the existing ones (some of which have naturally become obsolete).

Enjoy!

[Michael Lobko-Lobanovsky]

!!! IMPORTANT !!!

Patrice,

Please locate and fix the following materials in your .MAT file (I reworked them):

newmtl cam
Kd 0.25 0.25 0.25
Ks 1.2 1.2 1.2
map_Kd cam.png
map Ks _cam_roughness.png
map_bump cam_bump.png
Ns 512
illum 2

newmtl cam2
Kd 0.25 0.25 0.25
Ks 1.2 1.2 1.2
map_Kd cam2.png
map Ks _cam2_roughness.png
map_bump cam2_bump.png
Ns 512
illum 2

newmtl mask_ad_01
Kd 0.45 0.45 0.45
Ks 0.75 0.75 0.75
map_Kd mask_ad_01.png
map_Ks _mask_ad_01_roughness.png
map_bump mask_ad_01_bump.png
Ns 512
illum 2

newmtl mask_big_lock
Kd 0.45 0.45 0.45
Ks 0.75 0.75 0.75
map_Kd mask_big_lock.png
map_Ks _mask_big_lock_roughness.png
map_bump mask_big_lock_bump.png
Ns 512
illum 2

newmtl mask_gen
Kd 0.4 0.4 0.4
Ks 1 1 1
map_Kd mask_gen.png
map_Ks _mask_gen_roughness.png
map_bump mask_gen_bump.png
Ns 512
illum 2

newmtl mc_block
Kd 0.75 0.75 0.75
Ks 1 1 1
map_Kd mc_block.png
map_Ks _mc_block_roughness.png
map_bump mc_block_bump.png
Ns 1024
illum 2

newmtl helmet_logo
Kd 0.75 0.75 0.75
Ks 1 1 1
map_Kd helmet_logo.png
map_Ks helmet_logo.png
map_bump helmet_logo_bump.png
Ns 256
illum 2

and add a few more textures from the below zip to your R3PU folder!

[Michael Lobko-Lobanovsky]

Patrice,

The mc_block mesh contains a few tris that either i) have very bad normals that the current normal map makes too prominent to let them stay as they are, or ii) aren't textured at all (miss tex coords completely or have degenerate tex coord triangles).

Can you please try and fix them in your C4D?

[Patrice Terrier]

My friend

Thank you very much for your contribution!
I shall make it the official version, because it is the closest to the original.

I have also reworked a personnal version, with a few more meshes and extra materials, perhaps it will co-exist with the official one

Added
I shall see what i can do for the mc_block.

[Patrice Terrier]

About the mc_block, the only way i can do it, is to recreate the mesh from scratch