@thomthom said:

I'm not aware of anything that prevents bumpmaps from displaying - and from the distance of your sample render it's impossible to see if there is any bumpmap effect.

However, there are some requirements to make displacement work:
Any mesh with a material with displacement must be isolated - displacement will not work if the displaced mesh is connected to any geometry that has a different material. This includes edges. So ensure you have isolated (grouped, or made into a component) the mesh you displace - and ensure you also check the material of your edges.)

How about those texture at the back? they don't really have the exaggerated form as the material at the front, or is the distance too far to see such exaggerated form? meaning the front and back of the geometry (let's say it is a square box), cannot be of different materials, otherwise the bump or displacement settings would not work? so in order to solve that now, I would have to group them individually?
Anyway, would forming group of objects within another group might potentially caused the same problem?

anyway, thank you so much for your time. Looking forward to hear from you again!

Hello guys, been stuck in doing the render for a particular render. There are some parts of the render that do not exhibit any displacement or bump eventhough I have adjusted it couple of times (but there are some that show it eventhough same materials are applied). I have tried reverse face, orient face and even delete the whole block of geometry, redraw and reapplied the material but it still doesn't work. The following is a screen shots from my work:

I increase the displacement and bump just to exaggerate on the parts which work and which doesn't work. The particular materila that I wanted the effect to be on is the brick-like material in the picture. Please help as I have bee stuck with it for weeks and still haven't manage to come up with any solutions for it. Thank you in advance!

hello guys, need some help here. my sketchup has been acting weird when i attempt to open a new sketchup file with sketchup 8. I tried opening just a plain file as well but it turned out the same way. The problem is that the sketchup program only shows the top and bottom menu but nothing in between except for my previously open windows. Here is a screen shot of what I am trying to describe:

Please advise how can i fix this as it's a little urgent for me to finish up some works at the moment, thank you!

@thomthom said:

That is just a link for yourself.

Refer to these page on how to share Dropbox files:
https://www.dropbox.com/help/16
https://www.dropbox.com/help/167

hello just to check if links are working.. let me know, thanks!

@thomthom said:

That is just a link for yourself.

Refer to these page on how to share Dropbox files:
https://www.dropbox.com/help/16
https://www.dropbox.com/help/167

sorry, here is the link to the sketchup file:
http://dl.dropbox.com/u/4088775/Vray/testing%20model.skp

here are the brick texture and its bit map

http://dl.dropbox.com/u/4088775/Vray/brick002%20-%20Bump%20Map.jpg
http://dl.dropbox.com/u/4088775/Vray/brick002.jpg

thanks once again!

@thomthom said:

That link is not working.

sorry, I would resend again.

https://www.dropbox.com/home#/Public/Vray:::

@thomthom said:

The preview in the material window is a very small model - so when you see strong effects there, there will be little effect on a big architectural model.

@kken said:

Anyway, I would show an image to explain the bits where the material is consist of several blocks of the same material. notice how one face of the brickworks are selected and the other small bit (lower right) is not - what I am trying to say is that the wall has a few sections where they need to be of the same texture.

That is ok - you have have several connected faces grouped - as long as they do not connect to anything with a different material.

@kken said:

Anyway, what do you mean by a simpler model? probably uploading my model for testing would be better? however, my model is quite ridiculously big; 40mb.

That's why I'd be good with a small model - so it's not so large to download. And it avoids the distraction of everything else.
Do you purge your models? If you do not purge you will end up with lots of unused data in the .skp file. You can purge from Window > Model Info > Statistics > Purge Unused.

Can you copy just parts of your model to a new file, with some of your walls - and include the bump map and displacement map you use?

okay, thanks a lot! here is the link to the model, looking forward to hear what you could advise! thanks ya!

https://www.dropbox.com/home#/Vray:::

@thomthom said:

Sounds like there are multiple issues here.

Bump mapping does not require you to isolate the materials.

Only for displacements do you need to make sure the geometry is not connected to any other materials.

Could you provide a simple example model of what you try to do?

Sorry, I must have typed wrongly. Earlier you suggest that I isolate the materials or something along the line because apparently my displacement setup is not right, but I wasn't too sure how to do it. So, i thought probably I could just separate the brickworks material (it consists of several blocks of the same material) and paint them again with a newly created paint of the brickworks. However, it still doesn't work. Anyway, I would show an image to explain the bits where the material is consist of several blocks of the same material. notice how one face of the brickworks are selected and the other small bit (lower right) is not - what I am trying to say is that the wall has a few sections where they need to be of the same texture.

Anyway, both bits of bump and displacement doesn't seem to be working despite that the preview in the material editor show otherwise. Anyway, what do you mean by a simpler model? probably uploading my model for testing would be better? however, my model is quite ridiculously big; 40mb. Let me know if you need it. Anyway, so sorry for causing all these ruckus but I have been stuck for one week doing the render but is still achieving very little success, but I really appreciate whatever that you could advise me to solve my render problem. Maybe the setting that I did or the way I applied the texture is not in the proper manner. Anyway, looking forward to hear from you again!

@thomthom said:

You control the strength of the bump by adjusting the Multiplier value to for the bump texture.

Thanks, i try to regroup the texture of the bricks from sketctup, re-create the new material; bricks. However, the bump and displacement are still not working. Sorry but wonder if you could spend some time to explain about the group thing so that I may able to render the texture accordngly? perhaps a link that could explain my situation would be nice as well.

Anyway, really appreciate the time that you are spending to reply me.

@al hart said:

It is not correct to use a realistic image of a stone or brick wall to create bump maps or displacement maps, but many people do it just to get a different look.

Check out this page on the SketchUp Sage site: Bump Maps

True Bump Maps

Sample of "true" bump map rendered to create a stone effect:

This is the "bump map image" used to create this effect:

Bump Map from color image

Here are two images. The second uses the first image as an "not technically correct" bump map:

thank you for the thorough explanation on the bump map. That's a very detailed explanation. For my current render, I am re-using the original images of the textures but convert them to black and white in PS5. Then, I increase the contrast between the dark and white to create greater depth, in hope that the bump map would produce a more apparent bump.