Celestia Forums

I see your 128k texture has come into question from t00fri. Is it the surface texture level 5 or the specular that is being debated, or both? I don't presume to speak for t00fri, but I can address the generalities of your question. The reason some people have chosen not to use the 128k texture is b...

It worked! It was the step to convert the mask to the alpha channel I was ignorant about. I assumed the mask WAS an alpha channel, and that's why my image had no transparency. Thanks to all! --Dale-- Hello Dale, I'm glad you were able to get it to work. :) This is one of those things that seems so ...

I'd sure be grateful if you can give me the step by step to have a transparent background and a ghostly scarab translucent image (about 50% is what I'm looking for). I opened the image in PSP and there is nothing saved in the alpha channel. (I'm using PSP X so for other versions these instructions ...

OK, I set the preference as you describe, but now when I save it and load it in Celestia, the background is solid white. I'm feeling pretty dumb, but I just can't figure out how to get PSP to make a translucent png. It looks translucent in PSP, but when loaded is either like I showed before or show...

Selden, I fear this may be the problem, but I don't know how to fix it. I'll try a mask layer with a 50% opacity set on the bug outline and 0% opacity elsewhere and see how that works. Appreciate the help. I can't afford Photoshop, but if I can't get PSP working, I guess I'll have to figure out how...

With zsh there is the mathfunc module that you just have to load like so in your shell scrip: zmodload zsh/mathfunc Thanks for pointing me in the right direction, Fridger. I'll look for more information on this. BTW, I added two new arguments to virtualtex to work with the eight BMNG monthly tiles....

I had the idea of writing a shell script that would reduce a texture to the nearest power of two before tiling it into virtual textures. But it would require a logarithmic function (and a floor and exponent function). I have very little experience with shell scripting and I'm unsure these functions ...

DXT1 compression ratios are 6:1 to 8:1 DXT3/DXT5 compression ratios are 4:1 The doubling of size you were getting between DXT1 and DXT3 is normal. ;) BTW, I found out certain older Nvidia cards (mine included) have an issue with DXT1 in that only 16-bit color precision is used (instead of 32-bit). T...

Cartrite,

I concur. I did have some line ending issues earlier, but those were resolved and aren't related to these other problems. Good work.

Lone

Maybe I'm a bit dense but I didn't notice any compression at all. I tried the conversion on the level1 files and with dxt1, the size was 2.6 mb and with dxt3, it was 5.3 mb for *every* converted file. I used the command C:\Programme\NVIDIA Corporation\DDS Utilities>nvdxt -all -deep C:\temp\BMNG\tex...

I have just confirmed again that at least virtualtex 1.03 (try it!) runs well with the latest cygwin installation and using zsh on my core 2 duo notebook. And I have confirmed that virtualtex 1.03 works using bash. :) Here is the link: http://www.celestiaproject.net/~t00fri/virtualtex_1.03 I don't ...

cartrite wrote:LoneHiker,
Just to make sure, which instructions did you follow? The ones in Dummies.pdf?

I tried both that and the instructions by wcomer in the original thread:

http://www.celestiaproject.net/forum/viewtopic ... c&start=30

Lone

Hi Fridger, I'm addressing this to you specifically just to let you know I understand why you may be loathe to take on problems people may have with virtualtex and Cygwin. There are just so many variables--from user error to line ending issues to changes in Cygwin--that it would be a never ending pr...

Like I said, I got an earlier version of the script to run, so it's not critical to me personally that the latest publicly available version works with the most recent Cygwin--especially if Fridger has chosen to devote his talents to something with much greater potential usefulness. I'm going to use...

t00fri wrote:Sorry I am very busy professionally right now, but yes I have written a number of (unpublished) updates of my script. It would be good if you refer to the version number of what you are using!

Version: 1.04, 02/15/05
http://www.celestiaproject.net/~t00fri/virtualtex

Lone

http://www.celestiaproject.net/forum/viewtopic.php?t=3089&postdays=0&postorder=asc&start=0 Back in 2003 Fridger wrote a useful script for auto-tiling virtual textures. But the script was last updated (AFAIK) in 2005. I recently installed Cygwin / ImageMagick / Netpbm according to the dir...

I have just a doubt: why dxt1 and not dxt3 or something else? I suggested DXT1 because the VTs have no alpha data (as Cartrite correctly surmised). But you are also right, there is a quality difference between DXT1 and DXT3/DXT5. It's particularly noticeable in flat ocean color areas at extreme zoo...

It's been a while since I did this and the computer I did it on only had 512 mb ram but I could't run the ommand "nvdxt -all -deep" if the folder I ran it on had a total size being too large. I was also converting smaller 512x512 tiles. I ran nvDXT on 512 tiles at a time (1024 x 1024) without any p...

I know the BMNG VT tiles are in PNG which provide the best quality of the tiles but decrease a lot of fps probably. I hesitate to do a BMNG in DDS version but I don't know if DXT5 (with specific compresion ?) get the same result than PNG. What do you think ? BTW, I didn't mean to sound too critical...

I know the BMNG VT tiles are in PNG which provide the best quality of the tiles but decrease a lot of fps probably. On my modest system DDS makes the difference between being able to view a 64K set at high oblique/low altitude and not being able to. :wink: I hesitate to do a BMNG in DDS version but...