Some confusion when using displacement map

Henry

Here's the thing, I'm using displacement map on my figure to make some squish effects and it works great.         However,there comes problem when I'm render it.There is seam between the surface I'm applying displacement map to with other surface.And I find out that when applying the same settings of displacement map to those surfaces nearby,the seam gone.

So,I wonder if I have to apply displacement map to all the body surfaces of the figure in case of seam problem,or that just because of I set the displacement strength to 1.3 ? Besides,the maximum and minimum strength of displacement is 0.8 and -0.8. Please help and thank you.

crosswind

Yes, you have to set the same settings on the surfaces that have seams, as well as in the cases where there're geo-grafts. Displacement Strength with bigger value per se is not the culprit ~~

So, usually the better way to make squishy effects is to use morphs or you sculpt the shape yourself.

Henry

crosswind said:

Yes, you have to set the same settings on the surfaces that have seams, as well as in the cases where there're geo-grafts. Displacement Strength with bigger value per se is not the culprit ~~

So, usually the better way to make squishy effects is to use morphs or you sculpt the shape yourself.

Thanks mate, there seems no better way to make fine morph for low poly body parts besides displacement map.

Richard Haseltine

It should work, as long as the area at the join has a neutral value (usually mid grey, though that depends on the min and max displacement values). If you can make one of the limits (min or max, depending on which way you are going) zero then you just need to have the map at the seam black or white to avoid issues - hitting an exact mid value in the middle is tricky when there are an even number of values from back to white. Also, make sure that the displacement map's gamma value is set to 1 - if it is a colour map it may get 2.2  automatically, which will throw the mid value way off.

Henry

Richard Haseltine said:

It should work, as long as the area at the join has a neutral value (usually mid grey, though that depends on the min and max displacement values). If you can make one of the limits (min or max, depending on which way you are going) zero then you just need to have the map at the seam black or white to avoid issues - hitting an exact mid value in the middle is tricky when there are an even number of values from back to white. Also, make sure that the displacement map's gamma value is set to 1 - if it is a colour map it may get 2.2  automatically, which will throw the mid value way off.

It's great to confirm this, thank you Richard !