Dec 18, 2025, 10:15:58 AM
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Sweet Home 3D Forum » List all forums » » Forum: 3D models and textures » » » Thread: Light refraction and mirror effect rendering. » » » » Post: Re: Light refraction and mirror effect rendering. |
Print at Dec 18, 2025, 10:15:58 AM |
| Posted by Keet at Oct 2, 2023, 1:32:13 PM |
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Re: Light refraction and mirror effect rendering. Here are the specifications for MTL files: https://www.loc.gov/preservation/digital/formats/fdd/fdd000508.shtml and a more extended version: http://www.paulbourke.net/dataformats/mtl/ I use this for normal glass: newmtl GlassKs states the shiny/reflection of the material. Usually between 0 and 1, values outside that range will effect reflectivity. Ni is the refraction factor, i.e. the deformation when looking through glass. d is the opacity with a value between 0 and 1: 0.0 = fully transparent, 1.0 = fully opaque. • Your d value is pretty high for glass. • It's normal that light breaks (changes direction) through glass. Adjust your Ni value if it seems too much. Lowering the d value might also help in lowering the refraction. Greenhouses usually use cheaper glass which will refract more than window glass. • In real life curved glass will distort (refract) a little more than flat glass depending on the quality of the glass, adjust the Ni factor if it's too much. • You will have to experiment with the different values to get what you want. What you see in the 3D view is not exactly the same as when you render a photo, photo rendering is much more sensitive to the mtl values. ---------------------------------------- Dodecagon.nl 1300+ 3D models, manuals, and projects |
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