Bumps etc
Bumps etc
Hi people,
Say I have a texture that I want to bump.
I want to project that texture over a curved surface and use a concrete bump map. (see image, ignore the shapes, its just a test)
How do I keep the texture projected....but keep the bumpmap non-projected ie normal and unstretched.
Sometimes you want a bumpmap that looks completely different to the diffuse map.....but every time I apply bumpmap to a projected texture....the bumpmap is projected too.
When I try and position the bumpmap....the texture changes to the bumpmap and the render comes out wrong!!
I have looked at the manual and watched the video tutorials but they don't seem to cover this in-depth.
Projected texture over cuboid
Chained bumpmap.....it appears stretched the same as the diffuse map....so I reposition it so it is not projected
Resultant render...diffuse map gone, bumpmap rendered
This occured to me when I was trying to render some candy (boofredlays thread). I projected a stripey texture over the sweet and then tried adding a (concrete) bumpmap....but the bumpmap stretched the same as the original projected texture (see image, I have highlighted stretched bump on verticals)
What am I doing wrong?
Say I have a texture that I want to bump.
I want to project that texture over a curved surface and use a concrete bump map. (see image, ignore the shapes, its just a test)
How do I keep the texture projected....but keep the bumpmap non-projected ie normal and unstretched.
Sometimes you want a bumpmap that looks completely different to the diffuse map.....but every time I apply bumpmap to a projected texture....the bumpmap is projected too.
When I try and position the bumpmap....the texture changes to the bumpmap and the render comes out wrong!!
I have looked at the manual and watched the video tutorials but they don't seem to cover this in-depth.
Projected texture over cuboid
Chained bumpmap.....it appears stretched the same as the diffuse map....so I reposition it so it is not projected
Resultant render...diffuse map gone, bumpmap rendered
This occured to me when I was trying to render some candy (boofredlays thread). I projected a stripey texture over the sweet and then tried adding a (concrete) bumpmap....but the bumpmap stretched the same as the original projected texture (see image, I have highlighted stretched bump on verticals)
What am I doing wrong?
Oli
Re: Bumps etc
If you want quite advanced material things like UV map of bump completely unrelated to UV map of diffuse texture:
Export a piece of geometry via .xml
open in Kerkythea
edit texture>save to library
point TWL to see library folder
open SU and scene, use library to apply texture in any scene
Export a piece of geometry via .xml
open in Kerkythea
edit texture>save to library
point TWL to see library folder
open SU and scene, use library to apply texture in any scene
Re: Bumps etc
in the case you are talking about though, it may be very difficult to accomplish different UV mapping for bump channel and diffuse (color) channel. Only way I know is to use a procedural texture for the bump channel, as they have 'scale' that can be adjusted, but are independent of the UV mapping.
Re: Bumps etc
I gave up! I would never need this anyway (except for translucent, stripey, bumpy candy!!!) haha
Cheers anyway mate, at least I understand all the chains now!
Cheers anyway mate, at least I understand all the chains now!
Oli
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Re: Bumps etc
Chained = same as SketchUp material, with two-way communication.
Oli, you could right click > Make Unique Texture and use the newly created material for those odd surfaces.
Oli, you could right click > Make Unique Texture and use the newly created material for those odd surfaces.
Re: Bumps etc
this would work! and wouldn't involve leaving KT... I often forget about that 'make unique texture' function.Ecuadorian wrote:use the newly created material for those odd surfaces.
remember when loading a special texture for your bump to break the link first before loading the texture.
Re: Bumps etc
Yes I tried this.....but didn't break the link, thats where I went wrong. NICE ONE GUYS!!!
Oli
Re: Bumps etc
You can specify different textures for bump map and diffuse, but you can never specify different UV coordinates. SU simply only supports one set of UV coordinates. As Fletch suggested, you can add different offset, scale, and rotation via a library material, but for those are simple modifications of the existing UV coordinates. For something as complicated as projected for diffuse and non-projected for bump, that's just not possible.
Re: Bumps etc
This is something that would be extremely difficult if not impossible to do if not for the "make unique texture" function in SketchUp. It turns something deep and advanced into something quite simple... I love that.
After using SketchUp's context-click "Make Unique Texture" you will need to apply a material template to the new texture and be sure the bump link is broken, then apply the bump map to it.
After using SketchUp's context-click "Make Unique Texture" you will need to apply a material template to the new texture and be sure the bump link is broken, then apply the bump map to it.
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