MAx Radiosity and Bumps Problem

[JoeRedstall]

Hi Tim,

Bump maps only really show up when you have a light hitting objects at an angle. If you're using a Max skylight then you've got light coming from all around your objects. Have you tried adding a spotlight to your scene to help bring out the bump maps ?

[TimWoods]

yup, have erco IES lights, sun light systems and skylight for accurate lighting of interior, without radiosity the bumps are fine, with radiosity my lovely wooden floor has large black splodges over the surface. turn the bump off and its fine.
:shrug:
could be the sky i suppose, as its not a direct light unlike all the other lights. but its fairly esential to have one.

:shrug:

[DaForce]

you need to add a radiosity override material to the floor material, and then change the "bump scale" to a lower value...or is it higher... just tinker abit

should work.

[TimWoods]

indirect light bump scale? is that the one?
thanks DaForce
much appreciated!
:thumbsup:

[DaForce]

thats the one man.


have a play with it, and let me know if it works for you.

[ninjacore]

holy shit, i just started a thread about this kinda thing. Thanks to DaForce. i'm trying the indirect bump thing just now!

:thumbsup:

[DaForce]

heheh glad i could be of help!!

[max_5]

I have the same problem but I can't get the indirect light bump scale method to solve it. I only get the "bloting" when the surface is at an angle to the camera.

[DaForce]

hmmm thats what indirect light bump scale is meant to fix....i think.

you may just need to turn on super sampling for you floor texture.

[max_5]

still no luck with the supersampling.
Here is a picture of the problem (right wall). I am trying to get a white paint affect.

[DaForce]

wow, didnt work hey...man thats weird...hmm does it only happen at that acute angle?? for instance if you move the camera to the other side and look back at teh wall does it look ok?, if it does then it could just be that you have the bump map turned up too high on the walls

[max_5]

Yeah, sorry I forgot to mention that it only happens at acute angles. And the amout of bump mapping has no affect, only when the bumpmap is off it doesn't have the artefacts.

Btw thanks for the replys man :beer:

[DaForce]

hmmm that is weird, do you want to post the scene and maps so i can have a tinker and try to work it out for you.

you can email it to me directly if you want? is it viz4 for max5?

[max_5]

DaForce id be glad to post it or email it to you. My email is brian_murchison@hotmail.com

[DaForce]

ok cool, well put all the maps/jpgs and the scene file into a zip and email it to max3ds@apex.net.au

btw is it for max5 or viz4?

Ta

[TimWoods]

max_5, thats the same problem im getting. but i seem to also be getting it in areas where there is no direct light.
its a real pain in the ass.
ill post an image.
:buttrock: :buttrock:

[TimWoods]

that indirect bump seems to have sorted it out.
but it would be nice to get bumps working in areas where there arnt any direct light. i suppose this is asking too much. im grateful for the help. dont want to look a gift horse in the mouth!
:thumbsup:

[DaForce]

glad i could help

[DaForce]

max_5: I tried rending with the file that you gave me, and after i had added the advanced lighting override material and set the indirect light bump scale to o.1 it rendered fine. So im not sure what you tried.

see below

[max_5]

Ahh there it does work :eek:, sorry about that I messed up bad.

Thanks allot for helping out :thumbsup:

[DaForce]

thats ok man, if you need any more help just let me know.

[actpower]

You MUST use Raytrace MTL with GI and Bump. There is a problem with Standard materials and GI in 3DSMAX 5.

[DaForce]

yeah that may be true, but the indirect light bump scale did fix his problem. But i didnt know about the raytrace bit, thanks for letting us know :-) i will try changing his materials to raytrace and see what happens

Thanks ^_^

[max_5]

Yeah, that way does work as well.
Thanks

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