All posts related to V2
User avatar
By PaZ
#358559
Hi,
i notice that bump map, beside the pseudo-relief effect, also tends to give a "darken" effect where it's applied.
Did someone notice this beside me, or am i missing something ?

Paolo
User avatar
By PaZ
#358560
also, i seem to get no bump effect at all with some kind of UV, i.e.w ehn i have discontinuous UVs.
Is there any thing to keep in consideration to get bump working ?

thanks,
Paolo
User avatar
By PaZ
#358566
thanks for the info about darkening.
but the issue on this object is quite strange. i used a normal to get the effect, but no way to get a bump here.
I passed the scene to a friend, hope he can send to beta guys.


Paolo
User avatar
By eric nixon
#358582
Try a different bump map, pure b+w isnt a good idea, also try preview scene 'floor' to judge the strentgh needed. In the render, the mapping is to fine so we cant see whats happening anyway, try doubling the texture scale and zooming the camera in a bit...

In this case a normal map would avoid any darkening.
User avatar
By PaZ
#358584
i tried also non pure BW maps but the effect is always unreasonably weak. I think there's realyl something odd here.
Anyway i solved using a normal map :)

Paolo
User avatar
By eric nixon
#358585
Bump maps work, theres no doubt about that.. I noticed your map has no antialising, try blurring it 1 pixel.
User avatar
By PaZ
#358587
i did. i tried a bunch of different bumpmaps, even blurred ones.
Bump works usually, i agree. but on this geometry it has issues. i also checked it with another user and there's no way you can get a common bump effect here, if not using a normal map. Maybe there's something about geometry but i checked it several times, nothing is broken.
I cant share the whole object but if someone wants to try, i can breack it and send just that piece so one can try himself.. maybe i'm missing something but really i wonder what.

Paolo
User avatar
By PaZ
#358591
Maxwell's bump with blurred BW map. I put 100% intensity bump both in BSDF layer AND in Global bump to get this effect, so i cant get a stronger one that this.

Image

Maxwell's bump with Normal map - same as before, 100% in both places.

Image

And an attempt with Fprime, with same blurred BW map used as bump:

Image

frankly i expect a bump map to behave like in Fprime, as you see it's by far best behavior and i cant get it in maxwell.

Paolo
User avatar
By eric nixon
#358595
F-prime one looks messed up too. Looks like the UV's are broken, you could try to position spherical mapping coords onto the neck polys.
User avatar
By PaZ
#358605
yes, leave it alone... UVs are bad and lines are all zig-zag, i didnt build this object. Let's just look at bump effect: Fprime's is way more natural and much closer to what i expect from a bump than Maxwell's.

Paolo
User avatar
By eric nixon
#358606
Paolo the f-prime lighting is different, but also maybe the surface normals are all chewed up like the UV's and f-prime isnt using them...
There are issues with bump maps causing a gloss effect if tiled too fine, but I'm sure bump maps work, I use them all the time.
User avatar
By PaZ
#358609
I agree about bump mapping working usually, i use them too. I just notice that they always produce a strange and unwanted darkening effect in the negative areas.
But this case is different, i cant get them work as they do usually since the effect is extremely weak unless i use normal maps.

Paolo
Help with swimming pool water

I think you posted a while back that its best to u[…]

Sketchup 2026 Released

Considering how long a version for Sketchup 2025 t[…]

Greetings, One of my users with Sketchup 2025 (25[…]

Maxwell Rhino 5.2.6.8 plugin with macOS Tahoe 26

Good morning everyone, I’d like to know if t[…]