ground explosion shadow problem

[blackchicken]

hello I have little problem. First with deep shadow map, look at the picture and hip file. On the ground is lines. I dont know why, if scene is smaller, all is ok, but my scale is like that and deep shadow is wrong. setting is good. 512*512 pixsam 3*3 shadow qual 2 softnes 3. Where is problem 1024*1024 dont help.

another problem is, when I display settings set display sprite particles, my base particles will be stones, stamped with random scale, but they still render like one sprite, how in viewport and render turn of visibility?

Thanks a lot.

ground_03.rar

[crunch]

hello I have little problem. First with deep shadow map, look at the picture and hip file. On the ground is lines. I dont know why, if scene is smaller, all is ok, but my scale is like that and deep shadow is wrong. setting is good. 512*512 pixsam 3*3 shadow qual 2 softnes 3. Where is problem 1024*1024 dont help.

another problem is, when I display settings set display sprite particles, my base particles will be stones, stamped with random scale, but they still render like one sprite, how in viewport and render turn of visibility?

Thanks a lot.

This is most likely a shadow bias issue.

1) Remove the ground plane from the shadow mask of the light (then you can focus on more interesting areas)

2) Adjust the shadow bias on the light.