<html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class="">Hi Gökhan,<div class=""><br class=""></div><div class=""> We haven't considered working on raytracing in ChimeraX yet. What advantage do you think it would have? One that I can think of is that having multiples models with transparency could work correctly with raytracing.</div><div class=""><br class=""></div><div class=""> ChimeraX uses the same material for all surfaces now which defines how light bounces off it, how shiny it is. The ChimeraX material command controls those settings</div><div class=""><br class=""></div><div class=""><span class="Apple-tab-span" style="white-space:pre"> </span><a href="https://www.cgl.ucsf.edu/chimerax/docs/user/commands/material.html" class="">https://www.cgl.ucsf.edu/chimerax/docs/user/commands/material.html</a></div><div class=""><br class=""></div><div class="">We may in the future allow different models to use different materials.</div><div class=""><br class=""></div><div class=""> ChimeraX also allows using textures on surfaces with the "color image" command, although good use cases are hard to come by:</div><div class=""><br class=""></div><div class=""><span class="Apple-tab-span" style="white-space:pre"> </span><a href="https://www.rbvi.ucsf.edu/chimerax/docs/user/commands/color.html#image" class="">https://www.rbvi.ucsf.edu/chimerax/docs/user/commands/color.html#image</a></div><div class=""><br class=""></div><div class="">Generic 3D modeling packages like Blender, Cinema4d, Maya, ... work poorly or not at all with vertex colors which ChimeraX uses for multi-color surfaces like coloring a molecule surface by electrostatic potential. But sometimes people want to export those colorings from ChimeraX, for instance to print a 3D color surface and so they want the colors in a texture. So I have been looking at that use and will probably try to allow electrostatic and hydrophobic coloring to use a texture and to export as GLTF, OBJ, Collada or other 3D formats using texture colors in the next several months.</div><div class=""><br class=""></div><div class=""><span class="Apple-tab-span" style="white-space:pre"> </span>Tom</div><div class=""><br class=""></div><div class=""><br class=""></div><div class=""><div><br class=""><blockquote type="cite" class=""><div class="">On Sep 25, 2020, at 1:42 AM, Gokhan Tolun <<a href="mailto:gokhan@uow.edu.au" class="">gokhan@uow.edu.au</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><div class="WordSection1" style="page: WordSection1; caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;"><div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;" class="">Hi Tom,<o:p class=""></o:p></div><div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><o:p class=""> </o:p></div><div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;" class="">Are there any plans to implement RTX (real-time ray tracing) support to ChimeraX (and even better, allow the use of physically modelled materials and textures)?<o:p class=""></o:p></div><div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><o:p class=""> </o:p></div><div style="border-style: none none solid; border-bottom-width: 1pt; border-bottom-color: windowtext; padding: 0cm 0cm 1pt;" class=""><div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif; border: none; padding: 0cm;" class=""><span class="">Thanks,<o:p class=""></o:p></span></div><div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif; border: none; padding: 0cm;" class=""><span class=""><o:p class=""> </o:p></span></div><div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif; border: none; padding: 0cm;" class=""><span class="">G</span><span lang="TR" class="">ökhan<o:p class=""></o:p></span></div><div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif; border: none; padding: 0cm;" class=""><span class=""><o:p class=""> </o:p></span></div><div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif; border: none; padding: 0cm;" class=""><span style="font-size: 10pt; font-family: "Times New Roman", serif;" class=""><o:p class=""> </o:p></span></div></div><div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><b class=""><span style="font-size: 10pt; font-family: "Times New Roman", serif;" class=""><a href="https://scholars.uow.edu.au/display/gokhan_tolun" class=""><span style="color: rgb(5, 99, 193);" class="">Gökhan Tolun</span></a>, M.S., Ph.D.<o:p class=""></o:p></span></b></div><div style="margin: 0cm; 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