couple of vray questions

[Guest nazcaLine]

1.- there's a problem with a tile map in "baño1.jpg" because the tiny strips just don't appear well, i tried increasing the width of the stripes and nothing. my parameters have high irradiance map settings, -3, -1, 45-35, light cache 700-1000 samples. any ideas?????

 

2.- in the images cuzco 1 and 2, there's a very weird breaking shadow, i've never seen this in vray. only have one light, a free direct, vray shadow, with environment at 1.0 multiplier, parameters irr map -3-1, 40-20. light cache 700 samples.

 

i use vray 1.5 rc2 in max 8.

 

please help!!!

[Christopher Nichols]

For question 1, it looks like you are using thre Adaptive Subdiv AA. Change the settings to 0,2 or 1,3... or better yetm use Adaptive QMC AA at 1,4 to 1,8

 

For the second one, it seems like a geometry issue. Put a box in the in the same way and see if the issue is the same.

[Guest nazcaLine]

thanks for answering, christopher...it might be an antialiasing issue, it's true..i'll try adaptive qmc and yes, i was using adaptive subdivision.

and for the second...well, i'll put a box in the scene and see what happens...thanks for the reply.

[Guest nazcaLine]

well, guess what..it's not a geometry problem. this is definitely the most weird thing ever to hapen to me with vray, i've never seen this.

anyone has a slightest idea of what might be happening?????

[alias_marks]

Hook us up with some light settings. One thing I can think of is the shadow "bias" setting may be off.

 

This is a tough one.

[Tommy L]

youre not accidentally rendering with a previously saved irradience map are you?

[Guest nazcaLine]

here are the light settings..i can't upload the max file, it's too heavy...i'll be really happy if you can help me, thank you...

[daniohayon]

I'm curious...

 

Two quick options:

1. Open a new file in Max and merge everything from the original file and try rendering (don't forget to set the environment again for this new file). This might fix corruption in geometry...I do that sometimes after long modeling work and funny behavior from Max.
   
2. Delete all objects beside lights and the new testing structure, and see if it renders same. If it does than post that file.

[Guest nazcaLine]

problem solved!!!

it was the goddamn bias setting of the light. it is very strange, though, because the default setting of 0.2 has never, never ever caused me problems in any file. but in this case, i put the bias in 0.0 and voilà!!!

 

thank you anyway yo everybody interested in this case from the X-Files...

[Christopher Nichols]

problem solved!!!

it was the goddamn bias setting of the light. it is very strange, though, because the default setting of 0.2 has never, never ever caused me problems in any file. but in this case, i put the bias in 0.0 and voilà!!!

 

thank you anyway yo everybody interested in this case from the X-Files...

 

generally shadow maps require large biases, but raytraces lights need smaal values of 0.002 or so.