DX shader to render MAX 8

DInusty

hey dont know if this is possible. say i bake out a light map with a second uv set, then i go in and texture the object with the first uv set. i make a dx lightmap shader so that i can view them together. is there a way to get those to view as one in a render? anyone would know that would help me a ton! thanks in advance.

MoP

You can't use the DX shader, but you can probably fake it by using a Mix map, putting the lightmap into the Mix Amount slot (maybe invert it) and set the first Mix map to your diffuse, and the 2nd Mix colour to whatever you want your lightmap shadow colour to be.

This won't work if you have stuff like bounced light in your lightmap, it will only work if the lightmap is greyscale.

Someone else might know a better way, that's just what I thought off the top of my head.

Rob Galanakis

It would be pretty easy to modify a shader to accept a second set of UV coords for the lightmap, I'll try to remember when I get home to post a modified Cloward shader, unless someone gets to it first.

MoP

Well, I think he means a render as in a proper scanline render, not a viewport shader, Professor420. From the sound of things he's already got a shader displaying the lightmap, but he needs to render it.

DInusty

right scanline is what im looking for

Rob Galanakis

Whoops. Good luck.

EarthQuake

I think it would be good to have a shader for this anyway, prof, if you'de feel so inclined. For people to use in the current enviro challenge.

DInusty

alright so was at work talking about it today and the answer has been found. put the light map in the self illumination channel of the shader. Woot!

Rob Galanakis

EarthQuake wrote: »

I think it would be good to have a shader for this anyway, prof, if you'de feel so inclined. For people to use in the current enviro challenge.

If you or anyone comes up with a feature list, send it over, if its not too much work, I'll write it up (I also have a max ubershader on my site, forgive the bad theme right now)

IronHawk

Frozan wrote: »

alright so was at work talking about it today and the answer has been found. put the light map in the self illumination channel of the shader. Woot!

Did this work for you? I thought it washed out my texture pretty bad and really did nothing for the shadows.

I am thinking of trying a blend map using my lightmap inverted as a mask and then a flat back material as the blend material. Wont be able to do this till I get home though.

MoP

Isn't that what I said, IronHawk?

IronHawk

lol.. yeah what Mop said.