JoeBlack opened this issue on Jun 21, 2001 ยท 12 posts
JoeBlack posted Thu, 21 June 2001 at 12:51 PM
I was just wondering if it's possible to create a glass effect, for example in a window. I've got UV Mapper, and I use Ulead PhotoImpact 3.
jschoen posted Thu, 21 June 2001 at 2:31 PM
UVMapper is just used to create how the texture map will be applyed to the object. You need to create a Transparancy Map for a transparant effect. This can be done in any image editor program that saves jpeg or gif images. Black is completely transparent while white is completely solid/opaque. And various shades of grey determine how transparent an area is. You may also combine a bump map to the object to get a textured glass effect. I hope this makes some sense. James
Poppi posted Thu, 21 June 2001 at 4:22 PM
There's a demo download, fully functional, for 30 days, for Ulead PhotoImpact 6. I think you might enjoy it.
JoeBlack posted Thu, 21 June 2001 at 5:23 PM
How exactly do you create a transmap? Do I load a jpeg but load it in the "Transparency map" box, thereby converting it? I've used transmaps, but I haven't yet created my own.
JoeBlack posted Thu, 21 June 2001 at 5:27 PM
Oh, and where is this Ulead PhotoImpact 6 download? I can't find it anywhere on Renderosity.
jschoen posted Thu, 21 June 2001 at 6:46 PM
A Trans map is just a greyscale image. No conversion needed. Really basic. Look at a couple of maps made by other people and learn from those. Any image editor should read them. James
Crescent posted Thu, 21 June 2001 at 7:04 PM
JoeBlack posted Thu, 21 June 2001 at 7:57 PM
Maybe I'm a a bit dim, but I still don't know HOW they are made. How would I make one from scratch? You say it's a grayscale image - an image of what, created how? What do I create it from? A texture map? This is a strange concept I apparently can't get my head around :( I've tried looking for transmap tutorials but I can't seem to locate any.
Poppi posted Thu, 21 June 2001 at 8:46 PM
Yes....use the texture maps that you have. Just open your photo editor..your ulead..Open the texture map...copy it. Paste it as a new image. Add a new layer, opacicty..50-75%. Now, in this new layer...paint the places on the transmap that you want to show, white. Paint the parts you don't black. Anything that you want to show up, maybe a little bit, you paint a shade of gray. When you have painted over the whole texture map in in black and white...You adjust the transparency on the last layer to 100%, merge them, and, "Save As"...what you want.jpg, .tiff, etc. Now you can load this from where you stored it, in the trans box, just, like a texture.
Poppi posted Thu, 21 June 2001 at 8:49 PM
Oh, shoot...I left out...first thing...turn it into a grayscale image....then, do negative image to make it black and white....Doh...Then add the layer. Sorry about that.
DgerzeeBoy posted Thu, 21 June 2001 at 8:51 PM
What is it you wish to make a transmap of? You mention wanting a transmap for a glass object. What's the object? A beer mug, a window? You need the object first. You decide. UV mapper gives you the template you need to locate where a map (texture, bump, or transparency) will cover your object. Once you've got your template, decide to what part of your object you'd like to apply a degree of transparency. Create a greyscale image that covers those areas in a image editing program (i.e. Photoshop) using the template as a placement guide. As you can see from the example above, black areas appear transparent, white opaque. Use the materials editor to apply the transparency map to your object. (The option to do so is in the lower right corner of the editor) You can then decide the level of transparency using the sliders in the materials editor. Experiment. Good luck...
JoeBlack posted Sat, 23 June 2001 at 10:03 AM
I think I'm almost there, but my transmaps just don't appear, even when I set it to 100% max/min. I get a bit confused with converting it to grayscale/invert, and then setting its opacity. I want to create a cutoff effect for the female shortskirt. Coud you give a step-by-step guide on how to do it? I really aprreciate your input :) BTW: I managed to create a "glass ball" just by creating a texture, and then reducing its transparency/falloff accordingly, without needing a transmap (no transmap was loaded). Cheers JoeBlack