More WIP on R3PU

[Michael Lobko-Lobanovsky]

Apart from bad poly configuration in and around its oval recesses (obviously due to wild decimation), the mc_block mesh contains duplicate surfaces that are causing z-buffer fighting. This is the reason why its surface looks more or less passable with OpenGL automatic lambertian smoothing but fails as soon as a normal map is added...

Theoretically I could export this mesh, clean it of its duplicate surfaces, re-normalize in AkkuTrans, and import back into the model. This could improve its looks under the normal map. But I feel too lazy to engage myself in this affair. Shouldn't we rather leave it as is? This isn't the only mesh with duplicate surfaces; there are a few more minor mesh parts that could be improved on... But I don't want to spend my time on them because it's going to be too laborious for very little profit.

[Patrice Terrier]

I have worked on the exported FBX HP version, and it has the same problem, mailing because of slight point misalignment, but there is no duplicate surfaces. I already spent several hours trying to work around this problem

Just in case, i have attached the original FBX block group.

[Michael Lobko-Lobanovsky]

... there is no duplicate surfaces.

Our model does have a duplicate backfacing surface on the other side of mc_block. Please see the picture.

[UPD] And no, your FBX export also has backfacing polies and z-buffer fighting. Moreover, it has several layers of offending polygons, so that face culling in ObjReader doesn't help get rid of them completely.

[Patrice Terrier]

Here is the best i could…
(i have reworked totaly the mc_block, see b1 to b6 in the mtl file, and the matching png)

And the link to download the reworked project.
http://www.objreader.com/download/demo/r3pu.7z

[Michael Lobko-Lobanovsky]

Thank you very much Patrice,

You did a great job!

But if you don't mind, I will rework the b1 textures. Your mc_block looks like it's brand new from the factory. But that's a weather-bitten robocop SOB taken for an overhaul right out of the street riot, so its parts should look worn-out, scratched, and unpolished.

I'm also planning to make the uniformly colored textures of other b parts much, much smaller. This isn't going to change their coloration and glister but their VRAM footprint together with their mipmaps will thus be significantly smaller. "Small is beautiful", you know, unless it impairs quality, which in this case it doesn't.

[Patrice Terrier]

For the fun…

[Michael Lobko-Lobanovsky]

For the fun…

 

!!! KOOL !!! POSITRONIC BRAIN RULEZ !!! 




OK,

So catch a new set of _bX_XXX textures and please fix the following slightly reworked materials:

newmtl b5
Ka 0.15 0.15 0.15
Kd 0.75 0.75 0.75
Ks 0.75 0.75 0.75
map_Kd _b5.png
Ns 512
illum 3
refl chromium.png

newmtl b4
Kd 0.75 0.75 0.75
Ks 4 4 4
map_Kd _b4.png
Ns 96
illum 3
refl _dark_chromium.png

newmtl b1
Kd 0.55 0.55 0.55
Ks 1 1 1
map_Kd _b1.png
map_Ks _b1_roughness.png
map_bump _b1_bump.png
Ns 640
illum 2

The _b1_xxx textures have been mainly Free Transform'ed by me in Photoshop from the original bump and roughness maps. I think they give a better sense of wear and tear.

[Patrice Terrier]

Ok, done, thank you.

Do you see anything else to change before i update the official version?
I think i should add my police_logo mesh, see the attachment before i add wear and tear to it

[Michael Lobko-Lobanovsky]

Do you see anything else to change before i update the official version?

Yes, there's a strange patch on the back of the neck just above the battery. It isn't very noticeable but it does look like there's a severe z-buffer fighting going on there. (see top picture)

I think i should add my police_logo mesh ...

Let's try and see what it looks like when added.

... see the attachment before i add wear and tear to it

The original render's roughness texture displays it as a shiny transparent decal (sticker) glued on top of the black paint that covers the steel helmet. (see bottom picture)

Our conventional diff+spec+bump system can't reproduce it in a common mesh, and that's why  I corrected the roughness texture to show the logo as an ordinary white paint-on-black paint screen print. I think a separate transparent illum 2/3 mesh with a high Ns value may display your new logo as the original decal and preserve the metal paint scratches beneath it to simulate general wear and tear.

[Patrice Terrier]

I have updated the official version with the latest changes.

I hope i didn't forget anything…

[Michael Lobko-Lobanovsky]

Thank you, Patrice!

Nothing seems forgotten; in fact, there are some extra (older) textures not used in the final model.

Did you mean your logo to look as if it were a paper sticker glued on top of a metal cylinder?

[Patrice Terrier]

Yes, because as you guess it right, it is a sticker 

Do you know the name of the extra unwanted textures, as i haven't checked them myself (busy working on the animated version).

BTW, i have also updated the screen shots of the official version.

[Michael Lobko-Lobanovsky]

BTW, i have also updated the screen shots of the official version.

BTW you could have also updated the names of the persons who contributed to the reworking of the model, in the credit.txt file.

[Patrice Terrier]

Do you know that, indeed, there is a brain under the helmet.

[Michael Lobko-Lobanovsky]

Reworked by the ObjReader team

Perfect! Thanks!

Do you know that, indeed, there is a brain under the helmet.

Awesome!!! A positronic police robot evolves into a genuine bionic robocop!

P.S. Please let me have the model for checking before you update the official release!