I started to build my own library of chrome products. I have created a separate polygon with green grass and a blue sky with clouds, I am testing corrected models with chrome, mirrors and glasses there. I realized that for chrome, you do not need to change the MTL file, you only need to register prefixes in the necessary groups in the OBJ file formats. I changed the MTL only if I needed to get glass, an example for working with a shower cabin, if the model was originally with opaque groups. Otherwise, MTL files are not important. Only the prefix *******d sweethome3d_window_mirror_******** works. First, I write out on paper all the necessary names (and numerical values) for the necessary groups that need to be turned into chrome or a mirror. Then I export this "wrong" model in OBJ format and open it in a text editor, enter the mirror prefix in the right places. And I'm rediscovering it on my grass range. There I already have a whole army of faucets, washing machines, towel rails, hooks, paper holders and brushes)). Sconces, chandeliers and furniture with chrome legs will appear soon. In my project, I am now continuing to work on the bathroom and filled it with new chrome items from the landfill. Now a new optical experiment. In a cramped space with mirrors, it is impossible to accommodate a viewer without a very wide angle of view. Otherwise, you will not be able to show the entire interior. I set 97 degrees for the camera, which is a lot, a normal person without turning his head will not cover such an angle. I also tried to make the effect of turning the viewer's head during inspection. Today, my audience is the star of "Pirates of the Caribbean" by Keira Knightley. The camera is almost pressed into the corner of the room, so that the two figures of the actress are practically stuck to the walls immediately behind the camera. Why are there two figures and not one? Because I need to get two reflections - turning my head to the left and a reflection in the mirror above the sink and turning my head to the right with a reflection in the glass of the shower cabin. Figures in this position are obtained in the reflection of a very small size, they are unnaturally small. To add realism, I increased Kira's height to 200cm, but lowered the box with her figure below floor level, so that her eyes exactly matched the camera's 160cm level. Kira seemed to take a step forward from her unnatural position, she is now bigger in the mirror. Therefore, she looks more natural now, as if she is the one who looks and captures the picture with her own eyes, she and the camera are now one. Another important observation. I modeled a mirrored cabinet out of walls and cylinder boxes. I assigned mirror prefixes to the cylinders and boxes in the OBJ file, I did not do any new values for the MTL file to get transparent mirror material (the indicators for the mirror from the SH3D library are very complex, Ks, d, Ni..). This is not necessary at all! Just a prefix in OBJ. The mirror turns out to be perfect. And most importantly, the overall download speed has not increased at all!! Mirrored surfaces in such a large number did not increase the rendering time. A complex multi-model image at the third quality level was loaded for 2 hours and 45 minutes. This is a great result for me!! The main thing is to give the computer a rest for a couple of hours before such work. This is now my secret to fast loading. If the computer (mine, old, dusty, buzzing) does not rest, then it can load the same thing for 50 hours, I used to just sigh and be silent, now I give it a rest for a couple of hours and enjoy a fast render. Don't laugh)))). But this is now my most important secret, I'm sharing it with you.
the figures of people in the room illuminated by panels, even if they are not visible in the frame, work perfectly together with chrome objects, there are more complex reflections in metal, metal surfaces turn out to be more interesting, with colored highlights.
