Modelling rubber chain tread #43903 - Printable Version +- LDraw.org Discussion Forums (https://forums.ldraw.org) +-- Forum: General (https://forums.ldraw.org/forum-12.html) +--- Forum: Help (https://forums.ldraw.org/forum-13.html) +--- Thread: Modelling rubber chain tread #43903 (/thread-15362.html)

Modelling rubber chain tread #43903 - Roland Dahl - 2015-01-28 Hi, actually I am working on 70814 Emmet's Construct-o-Mech using SR3D. For modelling the rubber chain tread (#43903, GreaseBand 151Mm X 2m) I manually repositioned the component parts of this chain tread to get close to the required shape. As I am not fully happy with the result (see image) and my way of modelling I wonder if there is a more comfortable way to generate this rubber chain tread? Is there any LDraw tool which generates a nicely shaped custom chain tread #43903? From my understanding Lsynth offers only the “technic (rubber) chain tread”. Rubber tread #43903 is not included. Thanks for advice! regards roland Re: Modelling rubber chain tread #43903 - Philippe Hurbain - 2015-01-28 Lsynth results are not better (by far): see http://jc-tchang.philohome.com/manuel/Lsynth3.htm#ls_type_ttt Honestly your gease band looks quite good, but maybe if you share your LDraw file we can make something better? (not sure!!!) Re: Modelling rubber chain tread #43903 - Roland Dahl - 2015-01-28 I agree: The Lsynth rubber tread looks worse. Thanks a lot for offering help. But I dont wish to further bother you, as now I am very happy with my result! One more question: My version of Lsynth does not contain #30c TECHNIC_TREAD_THIN which was used by JC-Tchang. Is this something like a "selfmade" feature? Or do I have to do upgrade my installation? kind regards roland Re: Modelling rubber chain tread #43903 - Steffen - 2015-01-29 I like the look of your rendered rubber material. Could you share its material definition here maybe? Or your overall lighting setup? Re: Modelling rubber chain tread #43903 - Philippe Hurbain - 2015-01-29 Yes, it's a custom extension to LSynth definition file, made by LDraw part author JC-Tchang. You can download all the files in his lsynth page here http://jc-tchang.philohome.com/manuel/Images_LSynth3/lsynth3_exemple.zip (and I suggest that you read this page too through a language translator http://jc-tchang.philohome.com/manuel/Lsynth3.htm)! Re: Modelling rubber chain tread #43903 - Roland Dahl - 2015-01-29 Many thanks for your answer as well as for the links! Re: Modelling rubber chain tread #43903 - Roland Dahl - 2015-01-29 Hi Steffen, here are the rubber definitions I used for this render: #declare lg_rubber_finish = finish { ambient 0 diffuse 0.5 // Default is 1 phong 0.5 phong_size 20 reflection 0 conserve_energy } #declare lg_rubber_normal = normal { bumps 0.1 scale 0.1 turbulence 0 } // 256 RUBBER BLACK [LDRAW] #declare lg_rubber_black = texture { pigment { color srgb <33/255, 33/255, 33/255> } finish { lg_rubber_finish } normal { lg_rubber_normal } } But these are more or less default values as specified by the lgeo-library (see lg_color.inc). The only variation I did is to reduce diffuse from 1 to 0.5. Regarding lighting I usually use an horizontal area light as a main light: light_source { <-4000,-6000,-4000> color rgb 1 area_light <8000,0,0>, <0,0,8000>, 8, 8 adaptive 1 jitter circular orient Sometimes I add vertical area lights too, mainly for getting a better general illumination of the model respectively for enlighting dark areas: light_source { <-2000,0,0> color rgb 0.3 area_light <2000,0,0>, <0,-2000,>, 6, 6 adaptive 1 jitter circular orient } (or similar) Sometimes I add a simple light source at camera position, mainly for getting rid of strange render artefacts : light_source { LDXCameraLoc color rgb .5 } You can see these artefacts when you have a close look to the yellow wheels.The surface is not uniformly rendered: There are some dark and bright areas side by side. But for the quick render above I only used an horizontal area light. Last year I prepared a short tutorial about lighting. You will find some more information about my render settings inside. Please feel free to ask again. Glad when I can help. Regards Roland Re: Modelling rubber chain tread #43903 - Steffen - 2015-02-02 thank you very much!