Re: Bumpmap with negative Depth ??

2001-01-31 Thread Federico Mena Quintero
"Steinar H. Gunderson" <[EMAIL PROTECTED]> writes: > The question is: Does it use 255-bm or just -bm? And would that make any > difference? It wouldn't change anything. The local differences that are used to compute the surface normal would be exactly the same. Dude, follow the math! Read the

Re: Bumpmap with negative Depth ??

2001-01-31 Thread Federico Mena Quintero
lasm <[EMAIL PROTECTED]> writes: > Thanks for your explanation. I am not familiar with the > algorithm.. but just curious, would there be any difference > if the Depth takes in negative integer (currently only positive > accepted) ? Can you comment on this ? It wouldn't make any difference. T

Re: Bumpmap with negative Depth ??

2001-01-30 Thread Steinar H. Gunderson
On Tue, Jan 30, 2001 at 12:53:59PM +0100, Jens Lautenbacher wrote: >> Thanks for your explanation. I am not familiar with the >> algorithm.. but just curious, would there be any difference >> if the Depth takes in negative integer (currently only positive >> accepted) ? Can you comment on this ?

Re: Bumpmap with negative Depth ??

2001-01-30 Thread Jens Lautenbacher
lasm <[EMAIL PROTECTED]> writes: > Thanks for your explanation. I am not familiar with the > algorithm.. but just curious, would there be any difference > if the Depth takes in negative integer (currently only positive > accepted) ? Can you comment on this ? NO. the bm plugin takes the intensi

Re: Bumpmap with negative Depth ??

2001-01-29 Thread lasm
Thanks for your explanation. I am not familiar with the algorithm.. but just curious, would there be any difference if the Depth takes in negative integer (currently only positive accepted) ? Can you comment on this ? If the bumpmap can be improved, many other scripts/plugins which calls this

Re: Bumpmap with negative Depth ??

2001-01-29 Thread Federico Mena Quintero
[EMAIL PROTECTED] writes: >What he is suggesting is to invert the color value, so white > becomes black, and black areas become white, so that the bumpmap > will take a different height field to achieve the "inverse" effect.. > I have tried it before but do not quite like the result.. > >

Re: Bumpmap with negative Depth ??

2001-01-29 Thread lasm
What he is suggesting is to invert the color value, so white becomes black, and black areas become white, so that the bumpmap will take a different height field to achieve the "inverse" effect.. I have tried it before but do not quite like the result.. IMHO, the PS Lighting effects did it

Re: Bumpmap with negative Depth ??

2001-01-29 Thread Jens Lautenbacher
On 28 Jan 2001 17:20:39 +0100, Rebecca J. Walter wrote: > what if you color invert the one you use as the bump map? > if you use same layer, then duplicate, color invert, and use the > inverted to bump the regular. Sorry? I still don't see what this is about. the bumpmap layer used internally in

Re: Bumpmap with negative Depth ??

2001-01-28 Thread Rebecca J. Walter
what if you color invert the one you use as the bump map? if you use same layer, then duplicate, color invert, and use the inverted to bump the regular.

Re: Bumpmap with negative Depth ??

2001-01-28 Thread Steinar H. Gunderson
On Sat, Jan 27, 2001 at 02:05:03PM -, [EMAIL PROTECTED] wrote: > otherwise in theory at least, a negative depth value will >creat a sinking crater instead of a raised emboss... ?? Now, what is the difference between that? Seriously, all heights in such effects are indeed relative... /* Ste

Re: Bumpmap with negative Depth ??

2001-01-27 Thread Jens Lautenbacher
[EMAIL PROTECTED] writes: >Nope, that is not it.. Unfortunately, the Invert Bumpmap > option works just like the Azimuth, it changes the direction > of light 180 degrees, e.g. from NE to SW. That doesn't > do much to create the "carved in" effect. ??? what is carved in supposed to mean, the

Re: Bumpmap with negative Depth ??

2001-01-27 Thread lasm
Nope, that is not it.. Unfortunately, the Invert Bumpmap option works just like the Azimuth, it changes the direction of light 180 degrees, e.g. from NE to SW. That doesn't do much to create the "carved in" effect. In fact it is a bit redundant as you can always tweak the Azimuth value to ach

Re: Bumpmap with negative Depth ??

2001-01-26 Thread Garry R. Osgood
lasm wrote: > Hi All, > > I was trying to look for an engraved effect, the opposite > of emboss, i.e. to make the thing look caved in, instead of > popped out. Short answer: "Invert bumpmap" Long answer: Beware the sneaky qualities of human perception. Make a grey "altitude map" of a con

Re: Bumpmap with negative Depth ??

2001-01-25 Thread Kevin Cozens
lasm wrote: > I was trying to look for an engraved effect, the opposite > of emboss, i.e. to make the thing look caved in, instead of > popped out. While I couldn't find any plugin that does this, > I thought of an idea, if the bumpmap can be changed to accept > negative depth, in addition to

Re: Bumpmap with negative Depth ??

2001-01-25 Thread Tal Danzig
On Thu, Jan 25, 2001 at 10:10:40PM -0800, lasm wrote: > Hi All, > >I have been using the bumpmap plugin quite a lot lately. > It produces some very good embossy effects and I am very happy with the > results, thanks to the effort of the programmer. > > I was trying to look for an engrave

Bumpmap with negative Depth ??

2001-01-25 Thread lasm
Hi All, I have been using the bumpmap plugin quite a lot lately. It produces some very good embossy effects and I am very happy with the results, thanks to the effort of the programmer. I was trying to look for an engraved effect, the opposite of emboss, i.e. to make the thing look caved