Normal Map Issue with Cylindrical Objects?

debayan

Hello there what's the best way to bake  cylindrical? Whatever I try however I try keep getting terrible normal maps with artifacts  on edges,
I am having no problem with box/plane shape baking but with cylindricaAny fix?,(I have 15 face)

Neox

https://polycount.com/discussion/81154/understanding-averaged-normals-and-ray-projection-who-put-waviness-in-my-normal-map#latest

your lowpoly is just too different from your highpoly. right now you waste a ton of tris for no gain.
https://us.v-cdn.net/5021068/uploads/editor/6z/phh78dit2jke.jpg
like in this image, instead of a lowpoly bevel you should use the tris to make the outer rim rounder.

also 15 points on the crossection is a really odd number, take something that can be divided by 2. i guess you are not intending to do LODs but this makes or breaks any LOD workflow.

debayan

Neox said:

https://polycount.com/discussion/81154/understanding-averaged-normals-and-ray-projection-who-put-waviness-in-my-normal-map#latest

your lowpoly is just too different from your highpoly. right now you waste a ton of tris for no gain.
https://us.v-cdn.net/5021068/uploads/editor/6z/phh78dit2jke.jpg
like in this image, instead of a lowpoly bevel you should use the tris to make the outer rim rounder.

also 15 points on the crossection is a really odd number, take something that can be divided by 2. i guess you are not intending to do LODs but this makes or breaks any LOD workflow.

"your lowpoly is just too different from your highpoly. right now you waste a ton of tris for no gain.
https://us.v-cdn.net/5021068/uploads/editor/6z/phh78dit2jke.jpg
like in this image, instead of a lowpoly bevel you should use the tris to make the outer rim rounder."


Hey thanks for the reply, I didn't get the line, can you clarify once more?

Neox

remove the red bevel and use the triangles you gained in smoothing out the silhouette like shown in green

Taylor Brown

Think of it like those baby toys where you match different shapes to their corresponding holes. Imagine the HP is a perfect circlular hole and you're trying to cram a 15 sided shape into it. Its not fitting. Not because the edges arent smoothed but because there aren't enough faces around the object.

Ashervisalis

Adding onto what everybody else has said, I've always found you need to use a bit higher of a poly count with cylindrical objects.

debayan

Neox said:

remove the red bevel and use the triangles you gained in smoothing out the silhouette like shown in green

Hey thank you so much for this idea, never tought of it, Can you give me some more tips to improve Cylindrical object's normap map? 

Ashervisalis

edit: my computer is posting everything twice.

musashidan

These days we can afford more triangles. Still a lot of people using ultra-low geo on curves. Don't go mental, but always inspect your silhouette. If it's too blocky, don't be afraid to add extra segments.

debayan

haha I agree, I am mentaly disordered on maintaining low poly, dunno why but I always make them extream low, may be I was using my gt 610 for a long time that's why.