Glass Help
Glass Help
I have received a sample of glass for a project I'm working on. I have been having trouble trying to match it close enouh in skindigo. I hoping that some of you met give me some suggestions on which materials to use to give me a better quality result. The first 3 images have figure prints (oily marks) which will not be on the final product. All the photos were shot at the same time.
I have tryed the preset - frosted glass for the sand blasted area and the a transparent glass with a colour blue but the transparent rendered clear and the frosted glass was grey/black on all angles.
I look forward to you comments and thanks for any suggestions that you can offer.
I have tryed the preset - frosted glass for the sand blasted area and the a transparent glass with a colour blue but the transparent rendered clear and the frosted glass was grey/black on all angles.
I look forward to you comments and thanks for any suggestions that you can offer.
- Attachments
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- Real photo
- 1.jpg (233.87 KiB) Viewed 3810 times
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- Real photo
- 2.jpg (249.27 KiB) Viewed 3810 times
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- Real photo
- 4.jpg (161.56 KiB) Viewed 3810 times
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- Real photo
- 3.jpg (157.08 KiB) Viewed 3812 times
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- rendered image
- im1214314248.jpg (104.46 KiB) Viewed 3813 times
I'm not a Sketchup user, so I can't give you specific instructions on how to do this (I hear UV mapping is limited in Skp ), but yes: create one material for the glass.
The "clear area" should be bump mapped with a non bumpped area of the map (so light is unperturbed), the rest of the front of the glass should be mapped to the high frequency bump of your texture.
The "clear area" should be bump mapped with a non bumpped area of the map (so light is unperturbed), the rest of the front of the glass should be mapped to the high frequency bump of your texture.
Here's an example I threw together. The plane has thickness, and I've applied the bump map to the front of the plane (so that the other side is not blurred when viewed through)
Suzanne in shiny red is behind the glass.
Suzanne in shiny red is behind the glass.
- Attachments
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- The bumpmap i used
- frosttest.png (957.09 KiB) Viewed 3763 times
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- 2 minute render.
- im1214321901.png (282.77 KiB) Viewed 3763 times
Thanks for all the tips... Tomorrow morning I'm going to try and figure out how to do the suggestions. I wish I had more experience on skindigo … I guess that comes with time…This is my first major project and there is never enough time to fully learn the program that make outputs look the best. </Rant>
cpfresh nice render of a clear glass with a light sandblasting. I'm aiming for a blue glass with a more opacity to the sand blasting, similar to the photos at the top of the thread. Did you use zsouthboy’s suggestion for the clear area?
Thanks.
Post
cpfresh nice render of a clear glass with a light sandblasting. I'm aiming for a blue glass with a more opacity to the sand blasting, similar to the photos at the top of the thread. Did you use zsouthboy’s suggestion for the clear area?
Thanks.
Post
trying exponent 0 now ... allowed? dunno. but indigo accepted it. will post render in a few moments. another thing i forgot to mention, the two materials are sharing one internal medium name, which i never thought of looking at until Ono suggested it.
*edit* zsouthboy, show show!!!
*edit* zsouthboy, show show!!!
- Attachments
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- im1214412738.png (465.87 KiB) Viewed 3531 times
Last edited by cpfresh on Thu Jun 26, 2008 6:09 am, edited 1 time in total.
I got it!
Testing now
EDIT: Yes! It matches the reference almost exactly. I'll let it clear up a bit then upload and explain.
EDIT2: Okay images are attached.
Here's how to do it:
Glass pane:
Specular, 1.5 IOR, a little absorption of green.
Create a plane (1 sided, normal pointing towards camera) slightly INSIDE (but greater than ray_nudge_distance) the front of the pane of glass.
3 materials needed:
A)Diffuse
B)Blend of (A) and null using imagemap (attached)
C)Blend of (B) and null (I used 0.1 as the blend factor - adjust to taste)
Use (C) as the material for the plane.
Adjust the closeness of the plane to the outside of the pane to taste.
Testing now
EDIT: Yes! It matches the reference almost exactly. I'll let it clear up a bit then upload and explain.
EDIT2: Okay images are attached.
Here's how to do it:
Glass pane:
Specular, 1.5 IOR, a little absorption of green.
Create a plane (1 sided, normal pointing towards camera) slightly INSIDE (but greater than ray_nudge_distance) the front of the pane of glass.
3 materials needed:
A)Diffuse
B)Blend of (A) and null using imagemap (attached)
C)Blend of (B) and null (I used 0.1 as the blend factor - adjust to taste)
Use (C) as the material for the plane.
Adjust the closeness of the plane to the outside of the pane to taste.
- Attachments
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- Imagemap
- frosttest.png (30.43 KiB) Viewed 3534 times
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- Render result
- im1214416127.jpg (49.54 KiB) Viewed 3534 times
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