UV Mapping

this trick was from Thomas of Sketchucation, a reknown author of Vray toys


As you probably know, when you only have a colour instead of a texture in the diffuse channel, SU won't generate UV mapping.

So for instance, when you wanted an opacity map for a material with a plain colour, a work around often involves adding the opacity map to the default diffuse layer and set it's opacity to 0 so it's invisible, and then create a second diffuse layer which is visible.

What I just notices is that if you don't have any UV mapping, a map with UV tiling 1.0, 1.0 means the map will be 1 inch by 1 inch.

So you can calculate how large it needs to be. For instance, to make a map be 1000x1000x, you set the UV tiling to 0.0254, 0.0254.

Simply divide 25.4 by the length you want. (if you're using mm)

If you want a map to be 2400x1200mm:
U: 25.4 / 2400 = 0,010583
V: 25.4 / 1200 = 0,021166

This works fine for flat surfaces. Not sure how predictable it is if you got curved surface.

sir nomer ito na matagal ko hnahanap malaking tulong to.. tnx sir galing nyo tlga...!

sir kelangan po b pag mglalagay ng mapping na bitmap kelangan black and white?

UV mapping? bitmap siempre. mapa colored, mapa black and white.

popotchi wrote:sir kelangan po b pag mglalagay ng mapping na bitmap kelangan black and white?

please be specific sa question, alam ko kasi pag black and white mga bump at displacement layer ang nilalagyan nyan.. pagka sa diffuse kahit anong gusto mo na material bitmap pwede mo ilagay..