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I can reply this question on my own <br>
session->buffers->get_pass_rect(ccl::PassType::PASS_COMBINED, exposure, 1, 4, rawpixels); <br>
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is the droid I was looking for, unfortunatly I didn't manage to use get_denoising_pass_rect(...) since I get the same result than using <span style="color: rgb(0, 0, 0); font-family: Calibri, Helvetica, sans-serif; font-size: 16px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400;">get_pass_rect(...)
besides I set params.use_denoising etc properly </span></div>
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<span style="color: rgb(0, 0, 0); font-family: Calibri, Helvetica, sans-serif; font-size: 16px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400;">Any idea on this? thank you in advance.</span></div>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>De:</b> Bf-cycles <bf-cycles-bounces@blender.org> en nombre de F Escobar <materialesescobar@hotmail.es><br>
<b>Enviado:</b> lunes, 16 de abril de 2018 10:00<br>
<b>Para:</b> Discussion list to assist Cycles render engine developers<br>
<b>Asunto:</b> [Bf-cycles] Saving render without ending the session</font>
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I know that setting the write_render_cb function I can save my result (and it works ok) but whay if I need to save different frames from the same session?</div>
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I tried several tests before asking like session->draw(session_buffer_params(cyclesOptions),p); or display->reset(cyclesOptions.session->buffers->params);</div>
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also I noticed that tonemap() is a private function so probably I could need a way to call it outside the session since I always have session->display->draw_width and session->display->draw_height as 0 and it means that it was not correctly set.</div>
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Any thought on this? Thank you in advance.</div>
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